The fan chamber opened before the door finished moving.
Air struck Ty in the chest and shoved his coat against his ribs. The case rolled half a foot forward on the dry rail, then jerked sideways as the wind caught the glass. JJ caught the front frame with her sword flat against metal. Blue grabbed the rear guide and planted both boots.
The room beyond the door had been built round. Four large fans sat behind iron grates along the walls, and a fifth spun above the rail with its blades angled down. The west rail crossed through the center on a bridge of slats. Under the bridge, older gears turned in a pit full of dust and shredded labels.
"The room is trying to comb us through the wall," JJ said. "I would like that complaint entered somewhere official."
Blue leaned into the rear frame until the case stopped sliding. Old fat from the jar still shined on one cuff of her sleeve. She looked at the fans, then at the crooked worker sign above the door.
"Fan fair means balanced pull, not a festival," Blue said. "Stelia’s people had a sense of humor and several workplace crimes."
Ty kept one hand near the side rail. The claimant mark under his skin beat once for each blade above them. Fast. Hard. The mark gave him direction without words, like pressure against the inside of his palm.
The left wall pulled hardest, the ceiling fan pushed down, the rail wanted the case forward, and his body wanted the doorway behind him.
He set his feet wider and pressed his marked hand against the rail. The pulse sharpened. The old body inside the glass case shifted by the smallest amount, skull angled toward the far side of the room.
"The case can cross if the side pull stays even," Ty said. "Right now the left fan is winning hard."
"Please explain that in a way my sword can hate," JJ said. "My sword understands many problems already, including bad doors."
Blue pointed with Marcus’s bit. Three small service holes sat around the rim of the nearest grate. A scratched plate under them showed worker marks worn almost flat. Someone had gouged little arrows beside the holes years ago, probably with a knife.
"Those three holes trim the fan doors from here," Blue said. "One opens the upper shutter, one closes the left shutter, and one should slow the floor draft under the bridge."
"Should is doing a heroic amount of work there," JJ said. "I distrust every verb near machinery that tries to educate us."
The case crept another inch. The left fan pulled the glass toward its grate. The frame scraped along the bridge edge with a sound that went through Ty’s teeth. Blue shoved from the rear and failed to gain back the inch.
Ty felt the old body’s hand drag toward the glass wall. Bone clicked against the inside strap. The case was sealed, but the air had found the load anyway.
He moved with it and put his shoulder against the side frame.
"Keep your shoulder out of the squeeze line," Blue said. "That glass wins if the fan steals another inch."
"The rail is hearing my hand better when I touch the frame too," Ty said. "I can feel the bridge trying to correct."
"Then touch the useful part and keep every bone attached," JJ said. "We are running low on spare miracles from here."
Ty shifted his hand from rail to frame. The mark answered through the metal. The rail below clicked twice and raised a side lip under the left wheel. The case steadied, but the left fan dragged against the correction, blade after blade, each pull landing through Ty’s wrist.
Blue jammed Marcus’s bit into the first service hole. It fit badly, then seated with a grind. She braced her elbow against the grate and turned. The upper shutter moved above them by two inches.
The ceiling fan caught the change and pushed harder.
The case sank on its springs. Ty’s knees bent with it. JJ’s sword scraped down the frame as the weight settled.
"The wrong hole made the roof fan angrier," Blue said. "That discovery has arrived with strong physical evidence."
"Leave it halfway and try the left shutter next," Ty said. "If you close one side too much, the bridge throws us right."
JJ looked at him over the case. Her hair whipped across her cheek and stuck there from sweat and dust.
"You said that like you trust the room’s opinion," JJ said. "Please grow worse instincts less convincingly when I am trapped beside you."
"I trust pressure more than guessing today inside this room," Ty said. "Pressure has been rude all day, but honest."
Blue left the upper shutter half open and moved Marcus’s bit to the second hole. The bit slipped twice. The fan wind took the sound and chopped it into pieces. She gripped harder, teeth clenched, and turned until the shutter behind the left grate began to crawl down.
The left pull weakened, and the case lunged right.
JJ threw her weight into the frame and dragged her sword across the guide. Ty felt the correction late and shoved from the claimant side. His wounded shoulder flared hot enough to make his vision spot at the edges.
The case stopped with one wheel kissing the bridge lip.
"Left fan is lower, but now the right side has room to cheat," Ty said. "We need the floor draft slowed before the rail trusts the center."
"I have one bit, two hands, and exactly one body I need tomorrow," Blue said. "Somebody else gets the floor hole before my wrist quits."
JJ looked at the third service hole below the grate, then at her sword.
"My sword is offended, but my standards have moved," JJ said. "Tell the blade I apologized under pressure and meant it."
She slid the sword tip into the lower service hole and turned it with both hands. The hole was too small for the guard. The blade caught, flexed, and scraped. JJ leaned her shoulder into the hilt.
The floor draft under the bridge dropped in a choked cough.
Dust blasted up through the slats and filled Ty’s mouth.
Ty coughed into his sleeve and kept his hand on the case. His palm pulsed hard enough to hurt. The rail under the case clicked again, then stuttered, unable to decide between forward and hold.
The old skull in the case tilted toward him.
Ty watched the jaw shift a fraction while the fan shook the glass.
The movement came from pressure, strap, wind, and old bone.
Still, the sight reached under his ribs harder than the pressure did.
"The old body wants forward before the fans correct back," Ty said. "We have a short window if the rail commits."
"That sounded dangerously like a plan, so please improve it," Blue said. "I dislike dying inside a maintenance joke with witnesses."
"We make all three shutters ugly at the same time," Ty said. "Half roof, low left, low floor, then we walk the case through the center before the room rebalances."
Blue glanced at JJ, then at the fan above.
"Ugly at the same time is at least a tradition for us," Blue said. "I can hold upper and left if someone keeps me attached to my wrist."
JJ moved her sword deeper into the lower hole and set her stance. The wind dragged her coat against the grate. She lifted her chin toward Ty.
"You guide the case and talk only when the bridge changes," JJ said. "Long speeches cost oxygen we may need before the bridge."
Ty nodded and moved to the front corner. He put his marked palm flat to the frame and his other hand against the guide rail. The case felt too alive through the metal. Every fan pull translated through the glass, the straps, the old body, and into him.
Blue worked the bit between the upper and left holes. She twisted the upper shutter down a fraction, then shoved the bit sideways into the left hole and forced that shutter lower. JJ turned the sword at the same time until the floor draft coughed again.
"The bridge centered under the case while the room searched for balance.
"Move now, slow steps, center line under the case," Ty said. "If it yanks left, give me two inches right."
They pushed together, and the case rolled onto the bridge.
The fans changed pitch at once. The upper blade slowed, then caught again. The left grate rattled as if something inside had broken loose. Dust and old paper scraps spun around Ty’s legs. One strip slapped across the glass and stuck there, the faded print facing inward.
Blue saw it and swore under her breath without using words.
Ty read the strip through the moving dust.
The faded strip read keeper intake, living staff first.
The room had been sorting warm bodies away from sealed freight.
It was protecting workers from the bridge when rules still worked.
Or it had protected them once, before the shutters warped and the rail learned bad habits from old repairs.
"This place thinks living people should stay behind the line," Ty said. "The case is freight to it, and we are the hazard."
"For once the building and I agree on our career prospects," JJ said. "Keep pushing before it becomes persuasive about our future."
The left fan surged, and the case slammed against Ty’s side of the frame. Pain flashed from wrist to elbow. He nearly lost his grip. The marked palm stuck to the metal as if the rail had hooked him from inside the skin.
He pulled with the pain, and the rail answered.
The bridge lip rose under the left wheel and threw the case back toward center. JJ’s sword twisted in the lower hole. The floor draft died for three beats. Blue yanked the upper shutter half closed and took the change through both arms.
"Center is holding, but the left fan is fighting the old repair," Ty said. "Blue, give the left shutter one more tooth."
"One more tooth may take my thumb with it," Blue said. "I am charging the estate for that thumb."
"Charge double because I like that thumb more than expected," JJ said. "It has opened several things I hated very personally."
Blue gave the left shutter one more tooth.
The left grate banged. A bent locking tab snapped loose and shot across the room. It struck the bridge near Ty’s boot and skittered into the pit. The fan behind the grate slowed enough for Ty to see the separate blades.
The case rolled forward four feet before the bridge stole its speed.
The far rail waited beyond the bridge, but a hanging chain of thin metal tags swung across the exit. Each tag carried a worker name rubbed almost blank. They clattered in the wind, too light to hurt the case, too many to ignore.
Ty reached for them and the mark in his palm cramped.
"Leave the tags alone until we know their job," Blue said. "If the room cared enough to hang names, touching them buys trouble."
"The case will drag through them if we keep moving," Ty said. "They are tied across the rail at glass height."
JJ pulled her sword free from the lower service hole. The floor draft returned under the bridge and lifted dust around her boots. She stepped toward the tags, then stopped before her shoulder crossed the exit line.
The nearest fan changed pitch as soon as she neared the tags.
That old warning came back through the fan pitch.
Ty understood the warning by how fast the room pushed at her knees.
"It wants living people away from the exit until freight clears," Ty said. "The tags belong to workers who cleared this bridge before the rule broke."
JJ stared at the swinging names. The humor left her face, and what remained was practical enough to hurt.
"Then the room can have a witness, not a sacrifice," JJ said. "Tell me where the case needs to be."
Ty pressed both hands to the case. The mark beat through the frame. The old body inside shifted again, skull turned toward the tags. The jaw rested open by a sliver.
He looked at the chain and saw the problem.
The tags blocked nothing solid in front of the case.
They were waiting to be counted by the rail.
"The bridge wants the names to move before the glass crosses," Ty said. "Maybe proof that every worker is clear of the bridge."
Blue kept her bit in the left hole and looked at the tags.
"I can shake them with the fan if I open the upper shutter hard," she said. "It will shove the case down when I do."
"Do it when JJ and I hold the frame," Ty said. "We need the tags moving, not our teeth leaving."
"I object to the teeth portion of this forecast," JJ said. "The rest sounds like our normal quality of plan."
They braced, and Blue opened the upper shutter all at once.
The ceiling fan punched air down through the chamber. Ty’s arms buckled. JJ caught the front guide and shouted something the fan tore apart before the words reached anyone. The case slammed onto its springs, metal shrieking under the sudden weight.
The worker tags whipped across the exit and struck the first sensor plate.
One by one, they flipped upward and struck the rail sensor above the far side. The rail clicked with each hit. The count ran in metal, not words. Ty felt it through his palms as separate knocks.
The count landed as three separate knocks through Ty’s hands, eight, nine, ten.
The bridge accepted the exit, and the far rail loosened.
"Forward while the names are still moving above us," Ty said. "The far rail is open right now and listening."
JJ pushed until her boots slid. Blue abandoned the upper shutter and threw her weight onto the rear frame. Ty pulled from the front corner with both hands. The case crossed the last span and dropped onto the far rail with a hard clack.
The fans released them with one rough drop in pitch.
Air still moved, but the room stopped trying to peel them from the glass. Ty stumbled forward with the case and caught himself against the far wall. His marked hand left a red smear on the frame.
He looked down because the pain had become wet.
The skin across his palm had split around the mark. Thin blood filled the lines, then flattened as the pressure inside his hand pulsed again.
JJ saw it and stepped closer without touching him.
"That hand is bleeding in a pattern I dislike," she said. "Tell me whether it hurts like skin or like machinery."
Ty flexed his fingers. The pain sat deep, in time with the rail. The mark kept beating even after the fans settled.
"Both, and the machinery part is winning by pressure," Ty said. "The far rail is pulling through my pulse now."
Blue pulled Marcus’s bit from the service hole and came through the exit last. Her hands shook from the fan work. She wiped dust from her mouth with the back of her wrist and looked at the red in Ty’s palm.
"The next room better be polite about blood," Blue said. "I am emotionally finished with buildings that ask for body fluids."
The far rail answered by moving the case forward.
Three feet ahead, the corridor narrowed into a pressure lock with glass tubes running along both walls. Old red stains marked the inside of several tubes where liquid had dried in rings. A metal cuff hung from the first station at hand height.
The sign beside the cuff was cleaner than the others and read Pressured Blood.
Ty closed his fingers around the bleeding mark before the cuff could swing toward him.