Chapter 1: The Wrong Down

The freight restraint snapped while Thomas Harris stood in the Aft Cargo Spoke with two fingertips pressed to the wall and his mouth halfway through a fabrication log. One second the pulsing work lights striped his gray apron and the dense pallet beside him. The next, a buckle cracked past his ear and the pallet shot across the curved deck.

Apparent down went with it. Thomas had time to say, “Oh, come on,” in the offended tone a man might use when the toaster burned his last piece of bread. Then his boots skated sideways. The tool rail came at him hard enough to drive its round edge under his ribs. His recorder tore loose from his apron, swung on its cord, and smacked him in the chin. Across the sector, the pallet hit a cargo rail. Its composite deck boomed. A row of restrained sockets jumped in their loops, and the loops all pulled the same wrong way.

Deep inside Aster Vale, something much larger struck once.

The blow arrived through Thomas’s left palm. Flesh, old pressure scar, aluminum wall, ship: for one clean instant they made a single bad instrument. The collar impact had a low part he felt in his molars and a high part that made the work lights wink out. When they returned, they pulsed amber, and the spaces between pulses looked deep enough to fall into. His recorder kept working. “Delete the last six seconds,” Thomas said.

It chirped at him. “Fine. Keep them. Fabrication log, return spin-up. We have a released cargo pallet and—” The floor rolled another fraction under his hip. “—an unscheduled change in local down.”

The ship had been coming up to two point four revolutions per minute, the easy return spin meant to carry Mars Three through the Homefall Mission’s victory lap. Eighty-six days remaining. Air, food, samples, propulsion, four people aboard, all of it intact and pointed toward Earth. Thomas had spent the morning making a replacement latch guard because maintenance was honest work and victory speeches weren’t. Three minutes earlier, Dakota had called to tell him she’d hidden his good tea before Kyle could improve it. There were kinds of trouble you invited aboard because otherwise people got unbearable. This wasn’t one of them.

The balance display above the open radial passage came alive in pieces. First the ship outline. Then a red ring. Then the axis trace, a bright green worm frozen near the outer boundary. Thomas squinted at it, converting color and distance into the geometry his body already understood. The trace sat less than a fingertip from the limit. Beneath it, blunt white letters appeared: ACTIVE CORRECTION UNAVAILABLE. “Thomas.” Deborah’s voice reached him with a clipped digital tail, as though the damaged comm bus wanted the last piece of every word for itself. “What moved?”

He put one hand against his ribs and found pain, sharp but tidy. Tidy pain could wait. “Freight pallet. Aft spoke. Restraint failure during spin-up. Collar hit the housing once. Trace is live but correction’s gone.”

Deborah allowed two seconds of silence. She was good at that. Most people rushed to fill a silence, especially on a loop. Deborah let it sit there until the useful fact crawled out. “Is the pallet still moving?”

Thomas watched it during two amber pulses. The pallet had wedged nose-first beneath a rail on the far curve. One torn restraint web lay under it. The surviving latch ticked each time the deck flexed. “Stopped for now.”

“Your position?”

He looked across the open spoke. The red emergency cutoff waited on the other side, mounted waist-high beside the local telemetry cabinet. It was perhaps the ugliest switch on Aster Vale, a square paddle under a clear guard, designed so a frightened person in gloves could hit it. Thomas lay eight meters away with nothing but open deck between them. Eight meters had been hallway distance before the pallet moved. Now it had become geography. “Wrong side of the cutoff,” he said. “Nobody moves. Deborah, make that the whole ship. Nobody shifts a foot.”

“Hold position, all stations,” Deborah said, low and level. “Dakota, report.”

“Greenhouse Chord access. I’m sitting down, and I plan to remain a model patient.” Dakota sounded close despite the delay, which made Thomas want to answer her in the old easy way. He didn’t. Even moving his jaw felt like entering a number in the wrong column. “No injury here.”

“Kyle?” Deborah asked.

Static chewed at the channel. Then Kyle said, “Sample chord. Cabinet bowed out across the aisle. I’m clear. Archive seals are green.”

“Stay clear without going anywhere,” Deborah said. “I’m in the forward return chord. Thomas, you have all four positions. Give me the next safe action.”

That was trust, arriving half a minute before the answer and dangerous for it. Thomas rolled onto one knee. The new down pulled toward the pallet, turning a familiar patch of deck into a shallow ramp. A loose socket pressed against its restraint loop, relaxed, then pressed again. The collar had caught the large offset and quit with the ship still crooked. Nothing automatic was coming to clean up after it. The pallet stayed put. So did the bad geometry.

He touched two fingers to the wall. The aluminum skin carried pump chatter, fan tremor, and the faint recurring tick from the pallet latch. Ordinary ship noises. That was the mean trick of it. Aster Vale still sounded alive. “I need to test a displacement,” he said.

“With what?” Deborah asked.

“Me. Small.”

Dakota cut in. “Define small, Thomas.”

He almost smiled. She always made him name the thing he hoped could remain fuzzy. “One knee. Two centimeters along the chord. Hands fixed.”

“What do you expect?” Deborah asked.

“I expect to learn which way is worse.”

Nobody approved. Nobody had a better probe. Thomas planted both palms and slid his right knee toward the cutoff. He moved it the width of a thumbnail. The axis trace crawled outward.

At the same time, down slewed under him. His right shoulder dipped. The socket on the tool rail lifted against its loop and made a bright little clink. It was the kind of sound a teaspoon made against a mug, domestic and harmless, except there was no mug and harmless had just left the ship. “Stop,” Deborah said.

He already had. Sweat cooled beneath the apron straps. The green trace held closer to the red boundary now, and the distance between them looked meaner than any number. Four centimeters described the full envelope. His knee had spent a visible piece of it.

Thomas eased the knee back along the same path. The trace returned by increments. The deck settled with it. “My route pushes the axis toward the housing,” he said. “Fast enough that the collar would take another hit before a bladder bank answered.”

“Then you don’t cross,” Deborah said.

“Then I don’t reach the cutoff.”

“I understand the shape of the problem.” Her voice stayed measured. “Give me another shape.”

The tool bag hung from a hook at his left elbow. Gray fabric, yellow zipper, black grease at one corner. Dakota had repaired its handle with blue medical tape after Thomas overloaded it with torque heads, and the repair had become a standing joke between them. FIELD MEDICINE, she had printed across the tape. He unclipped the bag without lifting his hips. Inside were hand drivers, ceramic cutters, a dead battery pack he meant to rebuild, two sets of sockets, and the little Knipex pliers Kyle kept stealing. Maybe seven kilograms. Too little against Thomas’s seventy-nine, but a little was exactly what he needed next.

He pulled a coiled equipment tether from his apron and clipped one end to the bag. The other end went around the cargo rail behind his wrist. He paid out half a meter of line and placed the bag on the deck opposite the cutoff. “Same test,” he said. “This time the bag goes away from my route.”

“Your body stays fixed,” Deborah said.

“Yes.”

“Do it.”

Thomas pushed the bag with two fingers. It slid ten centimeters toward the wedged pallet. The green worm on the display drew inward at the same slow rhythm. Not much. Enough. He reeled the bag back, sent it away again, and watched the response repeat. Push, contraction. Pull, widening. The ship answered without hesitation. It answered the object differently because the object traveled against the path his body needed.

Thomas pictured a grocery cart rolling away while a shopper stepped toward the canned soup. He pictured Dakota saying that any explanation involving canned soup had better include lunch. The thought hurt in a place the cargo rail hadn’t touched. “I have a direction,” he said.

“You have a tool bag,” Deborah said. “Those aren’t equal statements.”

“No. The bag’s light.”

Near the anchored end of the torn restraint sat a separate metal service case containing spare spindle blocks for the fabrication bed. Dense parts in a steel shell, shipped low and strapped hard because mass had manners when people gave it some. The case had stayed on its floor eyes when the pallet crossed. Thomas could reach its handle from his kneeling position. Reaching was movement too, so he extended the tool tether, caught the handle with its small grapnel, and drew the case toward him one handspan at a time. Each pull nudged the trace the wrong way. Each recovery of the tool bag brought it back. “Tell me before the trace changes,” Deborah said.

“Case toward me on three. Bag away on the same count.”

He counted. Pulled. Pushed. The trace wavered inside one display mark. Again. The case reached his knee. He threaded the tether through both handles, tool bag to steel case, and hauled the knot until it bit. The ugly assembly had one useful virtue: it weighed enough to argue with him.

Thomas laid the route out in his head. He would move toward the cutoff while driving the weighted case the other way along the curved sector. Same time, opposed directions, matched rotational moment. The radius changed across the spoke, which meant distance alone would lie to him. He marked positions with strips torn from the blue tape on the bag: one by his left hand, one under the case, then paired marks farther along both routes. Cheap blue dashes on a billion-dollar ship. He trusted them more than the frozen correction system. “Deborah, I can cross.”

Dakota said, “Can and should are having a fight over here.”

“I know.”

“Do you?”

He looked at the cutoff. “The pallet latch is still ticking. If it releases the rest of the way, we get another load shift with active correction unavailable. I can isolate the spoke and catch the restraint bus from the far cabinet. Staying here is a choice too.”

Deborah’s next question came after the comm tail faded. “What stops you if the case stops?”

“Me.”

“That answer needs work.”

“Tether around my right forearm, left hand on the floor rail. I move one mark at a time. If the case hangs, I lock my arm and drop flat.”

“And if your shoulder passes its mark?”

“The trace reaches the boundary.”

There it was. Plain enough for everybody. Deborah said, “Kyle and Dakota, remain fixed. Thomas Harris, proceed one mark at a time. Call every stop.”

He appreciated the full name. He hated needing it.

Thomas braced the case at its first blue dash. The tool bag rode on top, its repaired handle facing him. He hooked his boot under the nearest floor rail, set the tether across his forearm, and counted. “One.”

His body moved toward the cutoff. The case slid away. Apparent down shifted sideways, then found a compromise between them. The axis trace quivered but held. “Stop.”

He stopped. Across the spoke, the clear guard over the cutoff caught one amber pulse and lost the next. Still too far. “Two.”

Body and case separated another paired measure. His bruised ribs complained when he transferred to the next rail. The tether sawed across his sleeve. A plastic parts tray, secured overhead, tilted enough to show the pale undersides of its clips. He reached the second blue dash. The trace had narrowed by half a mark. “Stop.”

“Trace is contracting,” Deborah said.

“I see it.” His voice sounded breathless and annoyed, which was fair because he was both.

The pallet latch ticked beneath the comm noise. “Three.”

Thomas committed his hips to the open passage. The service case traveled opposite him, steel bottom whispering over the deck. Then its front corner reached a raised wall seam and caught. His body kept going. The tether snapped tight against his forearm. His shoulder swung past the blue tape. On the display, green jumped outward.

Thomas dropped his chest and clamped the floor rail with his left hand. Momentum tugged his boots toward the cutoff. His right shoulder wanted to follow. He held it short of the next mark, cheek pressed to cold deck, ribs burning. The case sat across the sector with one corner jammed against the seam and the tool bag tipped onto its side. “Full stop,” he said.

“Thomas?” Dakota’s voice had lost every trace of joking.

“Stopped.”

The axis trace trembled near the boundary. No impact came. Behind him, one of the sockets strained against its loop without making a sound. “Can you reverse?” Deborah asked.

He checked his grip. Going backward meant pulling his mass away from the cutoff while the case stayed fixed, which would undo the last error but abandon the crossing. Safe if he could move slowly. Safe was now a word with splinters in it. “Yes,” he said. “But the latch may not give me another attempt.”

“What clears the seam?”

Thomas followed the tether with his eyes. It crossed a low guide ring between him and the case. If he pulled straight, the case’s trapped corner dug harder. If he lifted the line over the adjacent guide, tension would twist the case a few degrees and walk the corner free. His hand could reach that guide. His shoulder couldn’t travel another centimeter. “I can change the pull angle,” he said. “Small arm movement. Case should rotate away from the seam.”

“Should?” Deborah asked.

“That’s the honest word.”

“Do it without advancing your body.”

Thomas slid his right hand along the taut tether. The line had flattened his sleeve against his skin, and his fingers tingled. He got two fingers beneath it, lifted, and forced it over the second guide ring. The case pivoted with a scraping knock. Green moved outward a hair, stopped, then drew inward when the steel corner cleared. “Case free,” he said.

No one congratulated him. Good. Congratulations made people hurry.

He reset his forearm, pulled the case to its next opposed mark, and brought his shoulder even with his own. The trace contracted. A faint amber reflection slid along the cutoff guard. “Four.”

They moved together this time. Thomas crawled the last span on hands and knees while the weighted case traveled away from him, the tether between them making their separate motions one crude machine. His palm scar dragged over the floor rail. Warm blood slicked the base of his thumb. The display’s green trace shortened toward center, one bright segment after another. At the final mark, his left hand struck the cutoff rail. The case reached its opposed stop with a deep, settled clunk. The trace narrowed. Thomas rolled beside the cabinet, slapped up the clear guard, and drove the red paddle down. The cutoff fought him through half its travel. He hit it again with the heel of his bleeding hand, twisted the lock, and felt the local mechanism seat through the rail. Amber lights held steady.

For several seconds he stayed on the deck with his forehead against the cabinet. Fear came after the work, rude and late. His thighs shook. Sweat ran from his temple into one eye. He wanted Dakota to say something ordinary about his terrible posture. He wanted the collar impact to unhappen. Neither wish qualified as engineering. “Aft cutoff locked,” he said. “Crossing complete.”

Deborah asked, “What kept the trace in?”

He looked across the spoke at the service case resting on the far blue mark. “Equal rotational moment moving opposite me. My body went one way, solid mass went the other. The ship carried both without widening the axis.”

“You proved that once,” Deborah said.

“Once is what I have.”

Thomas opened the cabinet and pulled the local telemetry breaker. The panel woke row by row. One camera gave him static. Another showed Dakota seated against the Greenhouse Chord wall, short braids floating a little at their ends where down had changed. A third found Deborah braced between two rails in the forward chord. The last image resolved on Kyle pressed beside a buckled cabinet, one long leg folded under him and both hands held where the camera could see them. Green sample-status lamps burned behind his shoulder. The broken pallet shifted with a dry tick.

Thomas used the local restraint controls to draw the surviving web tight. The motor took up slack by grudging degrees until the pallet’s nose settled against the rail. He locked the web there. A brace, not a repair. Across from him, the weighted case remained exactly where the crossing had left it. “I have telemetry,” he said. “Kyle, there’s a sealed tool chest behind your left shoulder. Don’t reach for it. Deborah, you have a secured galley service case two rails down from your boots. Dakota, stay seated. We can build opposed moves from fixed solid mass, but we count every centimeter before anybody commits.”

“And the collar?” Kyle asked.

Thomas enlarged the frozen diagnostic. The impact flag remained red. No reset control appeared. Metal had taken the pallet’s answer and kept it. “Active correction is gone. The housing took one strike. I can’t tell you what margin remains.”

Nobody spoke for a while. The four camera views held four people in four parts of a ship built to let them walk whenever they pleased. Thomas gripped the cutoff rail with his good hand and watched the bowed access panel beside Kyle’s folded leg hold where it was. Deborah’s voice came through last, low and exact. “Thomas, tell me how anyone moves again.”