Scene 1

The convoy ping arrived as a soft triple-chime from the navigation console — the same sound Mara had heard a hundred times at this posting, routine, almost gentle. But the beacon board answered it with a flicker, a stutter, and then three long seconds of nothing before the light clawed itself back on. Three seconds of darkness over a debris field that would shred a loaded ore-hauler down to its keel bolts. Mara's hand was still on the console when she saw it: the timestamp gap in the log. Six hours of Davan's watch, gone. Not corrupted — deleted, deliberately, with the kind of access only a station hand possessed. She found him thirty seconds later, slumped at the beacon console in the forward compartment, the back of his skull dark and wrong. He had been dead for hours. She had been asleep for hours. The station breathed around her — the low-frequency hum of a reactor running hotter than it should, the tick of cooling metal in the outer hull, and something else. A sound that stopped the moment she noticed it: a footstep, or the deliberate absence of one, somewhere aft. Eight hours. One working beacon already guttering. A dead man at her feet and a station that should hold only two people, one of whom was her. The aft corridor stretched away from the forward compartment into dim emergency amber, its pressure doors standing open all the way to the reactor room. Mara slammed both palms onto the diagnostic terminal and dragged the beacon's power-draw log and the reactor's output telemetry into a split overlay, fingers stabbing through the menu trees until the two data-streams collided on the same screen — raw numbers stacked against each other, the moment the curves diverged standing out like a scar across the display. The numbers didn't lie and they didn't soften it. The reactor's output curve dropped clean off a cliff at 03:14 station-time — not a gradual fade, not thermal creep, but a surgical cut, the kind that only happened when someone who knew the system reached into its guts and pulled. The beacon hadn't failed; it had been starved. Cross-referencing the power log against the access manifest, she found a second wound beneath the first: Coolant Loop B was venting slow and steady into the void, which meant the reactor could sustain maybe sixty percent of rated output before thermal runaway forced an automatic shutdown — and at current draw, sixty percent kept the beacon alive for roughly four hours, not eight. Worse, a tertiary flag blinked in the corner of the overlay, almost polite in its red insistence: the emergency bypass conduit between the reactor room and the beacon array ran through Compartment Seven, and Compartment Seven's internal hatch was showing sealed and locked from the inside. She captured every timestamp on the beacon's diagnostic readout — the surgical 03:14 drop, the clean-edged silence where Davan's hours used to live — and logged the whole sequence under her own authorization code, fingers pressing each keystroke like a signature on a warrant, so that whatever came next, the record would stay. Then she pivoted to the reactor's physical sensor array and pulled the coolant-loop-B telemetry, hands steady on the panel as the numbers scrolled up: flow rate, pressure delta, thermal bleed — hunting for the shape of the vent, whether it was still bleeding Kell's warmth into the void, whether it was worsening, or whether something deliberate had set it in motion and something deliberate might yet close it. The log-capture command cleared — and then the screen went white. Not a flicker, not a surge: a deliberate wipe, cascading through the diagnostic buffer in real time, eating every timestamp Mara had just flagged as fast as the authorization code could stamp them. Someone was still in the system, watching her work, and they were faster than she was. By the time her fingers found the abort command, the 03:14 entry and every correlated beacon log were gone, overwritten with null strings, the evidence reduced to the memory in her own head and nothing more. The coolant-loop-B telemetry was still live, at least — and what it showed was worse than a slow bleed. The flow-rate graph had kinked downward in the last eleven minutes, a fresh step-change, the kind of profile that said the vent was not a fracture but a valve, and the valve had just opened wider. At current draw the four-hour window she had calculated was already wrong; the revised thermal model crawled across the bottom of the screen and settled on something closer to two hours and forty minutes before the reactor forced a shutdown and the beacon went permanently dark. She dropped to one knee on the cold deck plates, grease pencil already in hand, and began to write — timestamps, output figures, the jagged 03:14 cliff where the logs simply stopped — in broad, deliberate strokes across the bare metal, each number pressed hard enough to last. The grease pencil bit hard into the deck plate, leaving thick black lines that no remote wipe could touch — 03:14, output cliff, 47% drop, beacon stutter, Davan cold at console. Mara's hand moved fast and certain, muscle memory from a career's worth of analog backups when digital systems couldn't be trusted in a storm. When she sat back on her heels the figures were there, permanent as a brand, eight lines of evidence that existed now only in this room and in her skull. The reactor telemetry was the last entry, and what it showed stopped her cold: coolant-loop-B's vent valve had opened wider since she'd last checked — the thermal model she'd built twenty minutes ago was already wrong, and the beacon had less runway than she'd calculated. The hip wrenched as she levered herself upright, a white-hot protest radiating down through her thigh, and she crossed the console room in a tight, favoring stride — past Davan's empty chair, past the grease-pencil record scratched into the deck — until her palm found the cold lip of the reactor monitoring panel and her eyes dropped to the analog pressure gauge, the physical needle, the one thing on this station that could not be remotely wiped. The analog needle sat at sixty-one percent — just barely above the thermal ceiling, trembling with the fine vibration of a machine working at its absolute limit. Below it, the secondary pressure gauge for coolant-loop-B read wrong: the needle had crept past the safe-vent hash mark into a zone Mara had never seen outside a training diagram, which meant the loop-B valve had opened wider since her last reading, bleeding more coolant into the void with every passing minute. She did the arithmetic the way she had done it a hundred times on paper logs, without a screen, without a system she could trust — and the number that came back was two hours and forty minutes, maybe less, before the reactor tripped its own thermal shutdown to save itself and the beacon went permanently dark. The emergency bypass conduit through Compartment Seven was the only path to rerouting enough draw to buy more time, and its internal hatch was sealed and locked from the inside — which meant someone, or something, was already down there waiting for her to try. The needle dipped one more tick as Mara watched, crossing the safe-vent hash mark with the quiet finality of a door swinging shut, and the thermal alarm began its low, patient pulse — not a scream, just a clock, counting down the hours she didn't have.

Scene 2

The thermal alarm didn't let up. Its pulse filled the console room with a stuttering orange wash, and the needle on the analog gauge trembled at 61% — a hair above the ceiling, a hair below the shutdown that would kill the beacon for good. Mara knew this board. She had kept this station alive through ice storms and micrometeorite showers and a coolant bleed that would have sent a younger keeper sprinting for the emergency pod. She knew the loop-B valve didn't open wider on its own. It had been helped. The bypass conduit in Compartment Seven was the only path that could feed the beacon directly from the reserve cells, cutting the reactor out of the equation entirely — buying hours the reactor couldn't give. But that internal hatch was sealed from the inside, and nothing in the regulation toolkit opened a hatch sealed from the inside except the person who sealed it, a cutting torch, or the emergency override panel two corridors away at the secondary junction. Her hip was a hot wire from pelvis to knee with every step, and the corridor between here and the junction was a long one. Somewhere between the console room and Compartment Seven, the saboteur was still aboard — still in the system, still watching — and they had sealed that hatch for a reason. The thermal alarm pulsed again. The needle trembled. Mara dragged herself to the starboard bulkhead on her wrenched hip, teeth set against the flare of pain radiating down her thigh, and her palm found the load-shedding panel by feel — a bank of chunky manual breakers worn smooth by decades of drill rotations. She threw them in sequence: galley power dropped with a clunk, the crew-quarter ventilators sighed and went still, the secondary lighting strips along the lower corridor snapped off one by one until the console room existed in a narrower, harsher pool of amber emergency light. She kept going, pulling every circuit her hands could reach, buying the reactor back from the edge of thermal shutdown one dead breaker at a time. The analog needle shuddered, held, then dropped — 61 to 59 to 57 — and the thermal alarm cut out mid-pulse, leaving behind a silence so complete she could hear the faint hiss of coolant-loop-B still bleeding into the void. The beacon telemetry bar on the main console burned steady green. She had bought the needle back below the ceiling, but the load-shedding panel was nearly exhausted. Four breakers remained in the bank, and three of them were labeled with red warning tape: LIFE SUPPORT ZONE A, LIFE SUPPORT ZONE B, LIFE SUPPORT ZONE C. The fourth, unmarked and recessed deeper than the rest, had a physical key lock through its handle that she had never once needed to open in three years on Kell. Mara crossed to the panel in three careful steps, favoring the left hip, and crouched until her face was level with the recessed breaker — no label, no tape, no station-standard stencil, nothing but a cylindrical key lock seated in brushed alloy that had seen more handling than the rest of the panel combined. She studied the lock's collar. The anodizing was worn bright at the twelve-o'clock position, the way metal wears when the same hand turns the same key in the same hurry, again and again — recently, and more than once. She pulled her work light close and swept it across the breaker's face. There, in the shadow of the lock housing, a secondary stencil had been painted over with flat grey primer — the kind of quick cover-up that only showed when light hit at an angle. Three letters bled through: C-O-M, and beneath them a number that might have been a seven. Compartment Seven. The bypass conduit. The sealed hatch. Her thumb traced the worn anodizing, and the shape of it locked into place: whoever had sealed themselves into that compartment had used this breaker as a kill switch, and they had kept the key. She held her fingertip against the stenciled letters — COM-7 — the primer paint rough and recent under her touch, and let the shape of the thing settle fully before she straightened against the hip's bright complaint. Then she began: methodical, silent, unhurried as a woman who had learned that panic costs more than it buys. She ran her palm along the underside of the housing bracket, pressed into the gap behind the conduit chase, worked the seam where the panel's sheet-metal skirt met the deck — every surface within arm's reach of that recessed lock searched with flat, patient attention. Her knuckles found it before her eyes did. A small magnetic key fob, no bigger than a thumb, stuck flat to the underside of the conduit chase where the sheet-metal skirt curved back and left a shadow no work light reached from standing height. She peeled it free and held it up: a standard cylinder-lock key on a plain ring, and clinging to the ring a single strand of dark fiber — not station-issue orange, not the grey of a maintenance overall, but the deep charcoal of a civilian cold-weather liner, the kind worn under a pressure suit by someone who had come aboard expecting the cold between compartments. The key was warm from the metal it had been pressed against. Across the console room, the beacon telemetry held steady green — but somewhere past the sealed hatch of Compartment Seven, something made a sound: a low, single knock, like a boot heel shifted on a grating. The magnetic fob bit cold against Mara's palm as she closed her fingers around it, the charcoal fiber catching between her knuckles. She pushed off the bulkhead with her right shoulder doing most of the work, her left hip flaring its familiar protest as she straightened, and then she was moving — down the passage toward Compartment Seven with the key raised ahead of her, her body already leaning into the question of whether the lock would answer. The passage to Compartment Seven was forty meters of straight corridor, and she was twelve steps in when the station lurched — not a mechanical fault, not a thermal pop, but a deliberate, surgical power spike that hit the overhead strip lighting and killed it in a single blink, plunging the passage into absolute dark. Her work light was back on the load-shedding panel where she had set it down to use both hands on the breaker chase. When she reached for the wall to catch herself, her wrenched left hip caught the corner of a conduit bracket at full body weight — a white crack of pain — and her right knee came down on the deck plates with a sound like a gunshot. The fob was still in her fist. She had not dropped it. But the darkness ahead was total, the passage between her and Compartment Seven a black throat, and somewhere in that dark she heard, very distinctly, the soft pneumatic sigh of a pressure door cycling shut. The darkness ahead was absolute, and whoever had put it there was already between her and the door.

Scene 3

The darkness in the passage was absolute — not the comfortable dark of a powered-down room but the pressed, tactical dark of a space someone had turned into a weapon. Mara could hear her own pulse. Somewhere ahead, maybe twenty meters, maybe ten, came a sound: the soft, deliberate scrape of a boot sole on deck plating, then nothing. Whoever it was, they had stopped moving. They were listening for her, the same way she was listening for them, and the passage was a forty-meter tube with no branches, no cover, and only two exits — the one behind Mara and the one ahead, the Compartment Seven hatch she needed to reach. The COM-7 key was in her right fist, teeth biting into her palm. The hatch was somewhere in that dark. And the thermal alarm, silenced but not solved, was counting down in the back of her mind like a second heartbeat: two hours and change before the reactor starved the beacon and the convoy ran blind into the reef. Mara flattened herself against the cold bulkhead, shoulder blades finding the seam of a conduit brace, and let every muscle go still — her wrenched hip screaming at the held posture, her right knee throbbing where it pressed the deck — and she breathed in the smallest increments she could manage, ears straining into the absolute dark ahead for the one sound that would tell her exactly how far away he was: the involuntary exhale, the nano-scrape of a boot sole on painted steel. The passage gave back nothing but the low-frequency hum of the beacon drawing its costly power and the faint tick of contracting metal somewhere deep in the walls. The wait paid off. After forty-three seconds of nothing, a sound came from the darkness ahead — not a boot, but a breath held too long and finally surrendered: a soft, controlled exhale maybe fifteen meters up the passage, and then the almost inaudible creak of a knee joint as weight shifted from one foot to the other. The saboteur was not moving toward her. He was standing still, waiting for her to come to him, guarding the hatch — and now she knew exactly where he was. Mara dragged the key hard along the bulkhead seam behind her — a long, deliberate screech of metal on metal that filled the dark passage like a shout, broadcasting her position to the fifteen meters of black ahead — and in the same breath she dropped without a sound, palms and knees finding cold deck plate, and moved, fast and low, her hip grinding its protest into every lurch forward, her right knee sending a white spike up her thigh with each push, the pain real and immediate and beside the point, because she was already closing the distance while his attention was still fixed on the noise fading behind her. The scrape died off down the passage and for one suspended second the saboteur held — Mara could feel the attention of him, a pressure in the dark, aimed the wrong way. Then her outstretched left palm found the toe of a boot, hard synthetic sole, and she drove upward from her knees with everything her ruined hip and throbbing knee had left, both hands grabbing cloth and belt, slamming the figure sideways into the bulkhead with her full weight behind it. The impact rang through the passage; something small and hard skittered away across the deck plate — a tool, a weapon, she could not see which. He was pressed against the wall, breath knocked out of him, and she had one hand knotted in his collar and the other braced against the conduit behind his head, and the Compartment Seven hatch was somewhere only meters away in the dark at her back. Mara found his wrist in the black and cranked it hard up between his shoulder blades, driving him chest-first into the cold steel with her full weight behind it, her injured knee screaming at the impact, her hip a white line of fire. She put her mouth close to the back of his skull and said it quiet and final, the way a woman says something she has already decided: "The COM-7 key — where is it, and how do I lock the bypass conduit open so the beacon stays lit for eight hours?" He broke. Not slowly — all at once, the way a pressurized line goes when the weld finally gives. His cheek was against the steel and his arm was bent at an angle that promised to become permanent, and the words came out of him in a single compressed rush: the COM-7 key was on a lanyard under his collar, and the bypass conduit didn't need to be locked open — it needed the manual flow regulator inside turned three-quarters clockwise, a setting that would bleed just enough reserve power from the secondary capacitor bank to bridge the gap, and the regulator was a simple brass valve anyone could reach. Then he laughed, short and airless, and said the convoy wasn't the point — the convoy was never the point — and the thing he had come to Kell to do was already done, somewhere else on the station, and the beacon was the least of her problems now. Her free left hand found the lanyard in the dark by feel alone — cord, knot, the small hard shape of the key — and she ripped it over his head with one sharp pull. She transferred it to her already-cut right fist, the teeth biting deeper into her palm. "Whatever you've done," she said, her voice low and level and absolutely certain, pressed close enough that he could feel the words, "it waits. Eight hundred people don't." The saboteur went limp against the bulkhead — not unconscious, but emptied, the fight fully out of him. His breathing was ragged and shallow and he did not try to turn. In the dark, pressed against the cold steel, he said one more thing, and his voice had lost all its architecture: "The reactor's not going to hold. I made sure of it before you ever found Davan." The passage stretched ahead toward Compartment Seven, thirty meters of black, and somewhere in there was the bypass conduit and the manual flow regulator that could bridge the gap — and the clock that had been running in Mara's chest since 03:14 was now very loud. He said it quietly, almost gently, as though he had been waiting to say it for hours: "The beacon was never the point, Mara — whatever you think you're saving, it's already gone."

Scene 4

The passage smelled of recycled air and old fear. Mara's knee screamed every time her boot found the deck; her hip had gone from a slow burn to something that felt structural, a grinding wrongness that made her think of the word *fracture* and then deliberately think of something else. The saboteur was face-down on the steel, wrists locked behind him with a length of cable tie she had pulled from her kit, cheek against the cold floor, breathing in short controlled pulls like a man who had accepted the arithmetic of his situation. The COM-7 key was biting into her right palm. The passage was still black — the strip lights were gone and would stay gone. Forty meters ahead, at the end of that dark tube, was the Compartment Seven hatch and behind it the manual flow regulator: three-quarters clockwise, and the secondary capacitor bank would bleed its power into the beacon. That turned eight hours into something survivable. The convoy lived. But the man on the floor had said *the beacon was never the point.* The reactor needle had been at 61% when she left the console room — trembling at the thermal ceiling, possibly worse now. Two hours forty minutes, maybe less, before the draw forced a shutdown regardless of what she did in Compartment Seven. And somewhere further in the station — in a room she hadn't checked, in a system she hadn't looked at — something was already done. He was conscious. His breathing was controlled. He knew she needed him to talk faster than she had time to make him. The remaining meters to the Compartment Seven hatch were the longest of Mara's life — hip screaming, right knee sending white sparks up her thigh with every dragging step — but she closed the distance and jammed the COM-7 key into the lock with her bleeding palm, the torn skin catching on the teeth one final time, and turned it. The lock gave with a clean, solid *thunk*. The door swung inward on its counterweight and warm amber emergency lighting flooded out from Compartment Seven, painting the passage in long gold rectangles and showing Mara, for the first time since the lights died, the forty meters of corridor she had just crossed on broken hinges — and the saboteur's cable-tied shape still face-down at the far end, not moving. Inside, the bypass conduit ran the full length of the compartment, a fat gray cylinder bolted low along the starboard wall, and there at its midpoint, exactly where the schematics said it would be, was the manual flow regulator: a heavy brass wheel, primer-painted, with a faded clockwise arrow and the words SECONDARY CAP BLEED stenciled beside it in black. The beacon telemetry repeater mounted above the hatch showed a single amber bar — alive, but thin, the reactor's remaining margin burning down in real time. Mara threw herself through the hatch, bad hip screaming as her weight pitched forward. She found the regulator by the amber light alone, wrapped her bleeding right palm around the knurled collar, and hauled it clockwise — three-quarters of a full turn — until the conduit beneath her hand stopped being dead steel and became something alive. A low, bone-deep thrum climbed through her fingers and up her arm as the secondary capacitor bank caught and the power bled into the beacon line. The thrum rose through the conduit housing and into the deck plating beneath her knees, a bass chord she felt in her back teeth before she heard it. Then the amber emergency lighting in Compartment Seven brightened by a full stop. On the small status repeater bolted beside the hatch, a single green diode winked on: BEACON NOMINAL. The convoy was still eight hours out. The capacitors would not last eight hours. The saboteur's voice came back to her from the dark passage — *the beacon was never the point, whatever you think you're saving is already gone* — and the station's silence sat around those words like a held breath, waiting for her to ask what he had actually meant. Mara hauled herself upright against the conduit housing, bad hip screaming, right knee grinding its complaint with every shift of balance. The grease pencil came out of her chest pocket — the same one that had written the console-room record — and she pressed its waxy tip to the bulkhead and carved: the time, the regulator position, *BEACON BRIDGED — CONVOY SAFE — DAVAN OSEI MURDERED*, each letter two inches tall and deliberate. The kind of mark that survived a vacuum-cold station and a wiped log and whatever came after her. When the last stroke was done she capped the pencil and pocketed it. The conduit hummed beneath her palm, the secondary capacitor bank bleeding its stored power steadily into the beacon line, doing its quiet, patient work. She turned away from the amber light and the record she had made, into the dark passage and the long drag back toward the console room. Behind her the hatch swung gently on its counterweight; ahead, forty meters of darkness and a trussed man and whatever he had meant when he said the beacon was the least of her problems. The forty meters back through the dark passage felt like forty kilometers on a hip that had stopped asking nicely and started screaming, her right knee grinding its protest with every step. She covered the distance in a low, lurching drag and dropped to one knee beside the saboteur's cable-tied shape, fingers closing around the back of his collar — the same civilian liner fiber she had felt before — and hauled his face up off the cold deck plates until the sound of his breathing filled the passage, close and animal. Her voice came out flat and final, stripped of everything but the arithmetic of the situation. "What else did you do to the reactor. You have ten seconds." His breath came in a wet, unsteady rush — the sound of a man who had already done his accounting and found it didn't balance. "Coolant valve," he said, his voice gone flat too. "Manual override on loop-B. I cracked it past the mechanical stop before I came up here — it won't seat again from the panel, the threading's stripped on the valve stem. You need to go into the reactor crawlspace and pack the seat by hand or it bleeds out until the thermal shutdown takes everything." She released his collar and let his head drop back toward the deck plates. His next words were barely above a breath. "Tool locker, junction nine. There's a fiber-spool and a torque sleeve. That's what I used to strip it." Mara left him there in the dark passage, cable-tied and breathing, and began the long, grinding walk back toward the reactor bay — because if the valve stem was stripped past its stop, the beacon's new lease ran on borrowed time, and she was the only set of hands left on Kell to pack it.

Scene 5

The reactor bay met Mara with heat and the sour bite of venting coolant — a thin chemical mist hanging in the amber emergency light, the kind of haze that meant loop-B had been bleeding longer than the gauges admitted. The analog needle sat at fifty-seven percent, steady for now, but the air felt wrong: too warm, too wet, the deck plates faintly warm through her boot soles. The manual override valve was exactly where the schematics said it should be — a fat brass wheel bolted to the lower coolant manifold, knee-height, behind a removable inspection grate. Mara wrenched the grate free and saw the damage immediately. The valve stem had been backed past its mechanical stop and then forced further, the threads chewed, a slow silver bead of coolant working its way down the manifold casing. The wheel turned freely, uselessly — spinning on stripped metal, seating nothing. Packing it by hand meant exactly that: forcing a seal around a damaged stem with whatever she had, her body pressed into the gap while the reactor ran hot three feet away. The repair kit bolted to the bay wall — standard-issue, she had stocked it herself two months ago — held pipe-thread compound, a roll of high-temp fiber packing tape, and a pair of heat-resistant gloves one size too large for her hands. But the saboteur's parting words were still lodged behind her sternum: *the beacon was never the point*. If he had stripped this valve before he ever came upstairs — before Davan was dead, before the beacon cut out — then he had never been here for the beacon at all. He had been here to make sure she was busy with it. The question was what he had been buying time for, and whether it was already done, and the only place on Kell she had not yet looked was the docking collar. Mara pulled the repair kit off the wall bracket, pipe-thread compound and fiber tape coming with it, and dragged the heat-resistant gloves on over her bleeding right palm — the key-bite screaming under the rubber. She dropped onto both knees at the loop-B valve, her right knee finding the deck hard, vision graying at the edges. She packed the stripped stem the way she would pack a wound: compound first, forced into every gap with her thumb, then the fiber tape wound tight and tighter, loop after loop, her whole weight behind it, the hiss of escaping coolant fighting her every second until — between one breath and the next — it stopped. The analog needle shuddered, dipped, crossed back below the safe-vent hash mark, and steadied. She held her hands against the valve housing, shaking, and watched the needle hold. It held at fifty-four percent — a full three points below the safe-vent hash, the first time it had sat there without trembling since Mara came on shift. The chemical mist began to thin, and the amber emergency light caught the beacon repeater diode on the far wall: green, steady, not even a flicker. Mara's hands were still pressed flat against the valve housing, the heat soaking through the gloves, her right knee a constant bright complaint against the deck plates. Somewhere in the passage behind her the saboteur was cable-tied and breathing, and somewhere eight hours out a convoy was closing on the reef — and his voice was still in her ear, quiet and certain: *the beacon was never the point.* The crawl back to the main console cost her every step — her left hip grinding white-hot, her right knee folding on the threshold lip until she caught the panel edge and hauled herself upright. She pulled up the emergency laser array with hands still tacky with blood, fingers finding the nav-frequency dial by muscle memory, and keyed the oldest code in the lane: SOS-REEF, repeating, ugly and unambiguous, the pattern that every certified nav system on every ore-hauler in the sector was legally required to treat as a hard stop. The transmit key went down under her lacerated palm and she held it there — eyes locked on the acknowledgment buffer, the cursor blinking in the silence — because this was the only answer left, and she would not move until the buffer either filled with a course-correction ping or stayed empty and told her the worst. The acknowledgment buffer stayed empty for eleven seconds — eleven seconds in which the only sound was the reactor's low thrum and Mara's own breathing — and then it filled all at once: CONVOY LEAD HAULER IRONSPARK, NAV ALERT CONFIRMED, ALTERING COURSE TO SAFE BEARING, STANDING BY FOR RELAY HANDOFF. Two more pings stacked beneath it, mid-convoy and tail acknowledging in turn, their transponder codes scrolling green down the buffer. The laser array was still transmitting, SOS-REEF cycling on its old ugly frequency, and the beacon repeater diode above the panel burned steady green. But the buffer was also showing something else: a fourth transponder code, not in the convoy manifest, sitting quiet and dark two hours behind the haulers on the same approach lane, and it had not responded. Mara pressed the transmit bar down with her lacerated palm and held it — not a ping, not a navigation warning, but the full message burning out into the dark in plain text: *STATION KELL, SABOTEUR ABOARD, INTRUDER RESTRAINED, AWAIT AUTHORITY, DAVAN OSEI MURDERED, EVIDENCE ON DECK PLATES AND BULKHEAD, DO NOT APPROACH WITHOUT MARSHAL CLEARANCE.* The beacon telemetry ticked green with each pulse, confirming transmission, and she watched the repeater diode until the sequence completed — until the record existed somewhere beyond this station, beyond anyone's ability to wipe it, riding the same lane that dark fourth transponder had been quietly traveling for two hours, making its silence now a decision, not an accident. The beacon telemetry ticked green through the first two long pulses — and then the repeater diode went dark. Not a flicker, not a stutter: a clean kill, the same surgical cut as 03:14, and the acknowledgment buffer that had been filling with IRONSPARK's confirmation simply stopped mid-sentence, the last characters hanging on the screen. The grease-pencil record on the deck plates and the bulkhead in Compartment Seven still existed, but the transmission — Davan's name, the murder, the request for marshal clearance — had not completed. Whatever went out rode only two pulses into the dark before someone closed the channel, and IRONSPARK's nav team now held a fragment: a reef warning acknowledged, and then silence from the station that sent it. The beacon itself was still lit — the capacitor bridge held, the needle sat at fifty-four — but the console's transmit function was dead, its indicator lamp a flat, unblinking red, and somewhere aboard Relay Station Kell the saboteur's cable ties were the only thing standing between Mara and a second pair of hands. She already had the mic in her fist. She dropped to both knees on the console-room deck, the impact a white lance up her right leg, and slammed her palms flat over the grease-pencil lines — *03:14 SURGICAL CUT / DAVAN OSEI MURDERED / IRONSPARK NAV ALERT CONFIRMED* — the waxy letters pressing into her split palm as she put her mouth to the open channel and said it all in one raw breath: the time, the cut, the name, the reef, the dark ship two hours behind the convoy, every fact in sequence, loud enough that her voice cracked on Davan's name and the station walls gave it back to her. The open channel carried her voice out into the dark without compression, without encryption, raw transmission bleeding across every frequency the station could push — and in the silence that followed, the acknowledgment buffer flickered back to life with a single line: IRONSPARK COPIES ALL, HEAVING TO, CONVOY HALT ORDERED, DARK CONTACT BEARING LOGGED. Then a second voice, a different callsign: HAULER CASSAVAR, WE HAVE YOUR DARK CONTACT ON PASSIVE, TRACKING, DO NOT GO SILENT AGAIN. The channel stayed open, both ships holding, the reef now a known thing rather than an invisible killing ground — and the beacon diode on the repeater panel sat dead and flat, the station's own light still murdered, with two hours before the dark ship behind the convoy closed to whatever it had come here to do. The acknowledgment buffer sat full and unmoving on the screen — IRONSPARK holding, CASSAVAR tracking the dark contact, the convoy stopped dead in the lane — and Mara stayed on her knees on the deck plates, both palms pressed over Davan's name in the grease pencil, breathing. She stayed on her knees for a long time after the buffer stopped filling, her palms flat over the grease-pencil lines until the deck plates warmed under her hands and the reactor's thrum settled into something almost steady. When IRONSPARK's boarding party cycled through the lock four hours later — two officers and a station inspector who wrote everything down twice — Mara was sitting with her back against the console, the COM-7 key still in her fist and the saboteur cable-tied in the passage where she had left him, exactly as she had promised. She gave her statement once, clearly, and pointed to the deck plates and the bulkhead in Compartment Seven and let the grease pencil speak for Davan, because that was what she had written it for. The convoy passed the reef without a single hull lost, and the inspector's report, filed six days later, recorded the cause of death as homicide and the name of the responsible party in full — which was the only thing, in the end, that Mara had asked the job to give her.