Chapter 45 – Return Terminal
Kai's boot slipped on the first rung.
His boot came down on wet rust. It slid before his weight settled, and the jolt ran straight through his injured ankle. His fingers locked around the side rail. The B2 fob pressed into his palm hard enough to leave a corner-shaped mark.
Below him, Nia stopped moving.
"Put your good foot on the inside rail," she said.
Kai did not look down. The shaft was too narrow for that to help. There was only Nia's shoulder a few rungs below, the ladder disappearing past her, and a strip of blue light spilling through the open chase above them.
"I have it."
"You slipped on the first rung."
"I still have it."
She did not answer. She moved one hand lower on the rail and began down again.
Kai followed because the blue light was getting closer.
The shaft had been built for cables, not people. His shoulders brushed the concrete whenever he shifted. Bundles of old wire ran beside the ladder in metal trays: gray communication cable, thick red fire line, a black bundle wrapped in cloth tape that had gone stiff with age. Water dripped somewhere below. Each drop landed on steel with a small, patient tick.
He kept the fob in his right hand and the rail in his left. His shoulder hated that arrangement. His foot hated every rung. By the fifth step, sweat had gathered under his collar despite the cold air coming up the shaft.
Blue light touched the upper rail.
It did not fill the shaft all at once. It laid itself over the steel in thin horizontal strips, measuring the distance between each rung. The color reached the black cable bundle and paused.
Nia looked up. "It found the ladder."
"It found the opening."
"Same result."
The blue strips tightened around the rungs above Kai's head.
COLLECTION TRACE: DESCENT RECORDED
The words appeared on the concrete beside him, then faded.
Nia read them over his shoulder. Her jaw set, but she did not slow down.
"That is yours," Kai said.
"I know what I agreed to."
"You agreed to transit."
"I agreed to get us out of the lift. The rest came with it."
The sentence was not angry. That made it worse.
The edge of Mateo's summons showed beneath the hem of her jacket whenever she climbed. The paper had survived the lift, the cart, and the false office because Nia had kept it pressed against her side. Now the blue trace was using the same record to follow her down a service shaft.
Kai wanted to tell her to give it to him. That would have changed nothing. The summons did not belong to him, and he could barely keep one hand on the ladder.
"It should not have been your cost," he said.
Nia looked up at him. The blue light put a pale edge along one cheek.
"It is my cost now. Keep moving."
There was no kind answer to that. Kai lowered his good foot to the next rung, and his ankle buckled before he could stop it. His left hand slid down the rail. The fob slipped against his sweaty palm and struck the metal tray beside him.
Something caught it.
The fob did not fall. Its edge lodged against a bare copper contact inside a cracked junction box.
The shaft flashed white.
Pain shot from Kai's wrist to his elbow. The red line under his skin pulled tight, not sharp, not hot, but deep, like a muscle being forced through a motion it had never learned.
He bit down on the sound that wanted to come out.
Nia climbed up one rung and caught his sleeve. "Let go."
The junction box had come awake around the fob. A thin screen, hidden behind the broken cover, flickered with old amber light.
MANUAL LINE CHECK
SOURCE OBJECT CONTACT DETECTED
HOLD FOR VERIFICATION
PENALTY: RETURN TIME
Nia saw the last line. "Kai. Pull it off."
He tried. The fob would not move. The copper contact had closed around one corner of the old metal tag.
The junction box did not look like the System had built it. Its cover was dented and held by two mismatched screws. Someone had written `FIRE PHONE` beside the hinge in black marker years ago, then scratched at the word until only the first four letters remained. The System had found an old piece of building hardware and given it a rule.
Above them, blue light moved down another rung.
"It has it," Nia said. "We don't need another screen."
"We need to know what 31B was."
"It was a trap."
"It was a terminal." He looked at the amber display. "Those are not the same."
Her grip tightened on his sleeve. "And if this takes the fob?"
"Then we are done anyway."
He hated how close that sounded to the truth.
The display counted upward.
VERIFICATION HOLD: 00:00:03
The copper contact grew hotter against his palm. Kai kept his hand around the fob and forced his thumb against the edge, holding it in place instead of trying to wrench it free.
VERIFICATION HOLD: 00:00:08
The red line in his wrist throbbed in time with the count. His injured foot swung uselessly below him. There was nowhere to put it and no way to brace without letting the fob go.
Nia looked from the blue scan above to the display. "Ten more seconds. Then I pull you off it."
"Fine."
"That was not permission to pass out."
He managed a breath that almost became a laugh. It hurt too much to finish.
VERIFICATION HOLD: 00:00:14
The amber screen cleared.
RETURN TERMINAL: 31B
SOURCE LINE: B2 FIRE CONTROL
REQUEST TIME: 09:14:32
SOURCE RECORD: UNAVAILABLE
Kai read the lines twice.
Room 31B had not been the sender. It had been the place where something from B2 expected an answer to come back. That was all the screen gave them. No name. No voice. No person waiting at the other end of the line.
But it was enough to make the trap in 31B worse. The room had not wanted them to answer a call from itself. It had wanted them to fill in a return message for someone who was still missing.
Kai remembered the receiverless phone on the bolted desk. The cut cord. The red light beside the empty label slot. It had never been waiting for a voice from Room 31B. It had been waiting for the line from B2 to be closed by anyone foolish enough to stand in the blank space.
The thought made his grip tighten. The copper contact burned through the sweat on his palm.
The screen changed before he could say any of that.
RETURN TIME DEDUCTED: 00:01:30
The fob tore free of the copper contact.
Kai nearly dropped it again. Nia caught his wrist, not the fob, and kept him from pitching backward into the shaft.
The timer woke in his palm.
00:03:31
For a second, he could only stare at it.
Nia did not need to ask what the number meant. "It charged us for checking."
"For holding the line open."
"Same cost."
The blue scan reached the junction box. Amber light vanished under it. The screen went dark, leaving only the smell of hot dust and copper.
Kai pushed the fob into the inside pocket of his jacket. He needed both hands now. The metal felt too warm against his ribs.
"31B was the return terminal," Nia said. "B2 was the source line."
"A line is not a person."
"No."
"And the source record is still unavailable."
"Also no."
She looked down the shaft. Her voice was quieter when she spoke again.
"But it means the room was waiting for someone to answer B2."
Kai nodded once.
"And whoever started the line is still missing," he said.
"Or whatever started it."
He looked at her.
Nia did not look away. "You said a line is not a person. I am not going to make it one because that would be easier."
The fob timer pressed against his ribs. Three minutes and change. The timer proved nothing. It only told him how little time they had left.
The next blue strip came down the rail toward his hand.
"We move," he said.
They did.
Nia went first, steady and quick without rushing. She kept three points of contact on the ladder whenever she could. Kai watched the soles of her shoes and copied the rhythm as well as his ankle allowed.
One rung. Good foot down. Hands lower. Bad foot after it.
The pattern was simple until his body stopped cooperating.
The shaft passed through the floor slabs without any signs or room numbers. Every so often, a square opening showed the edge of another cable tray before the concrete swallowed it again. Kai could not tell whether they were going down through the real tower, a partial copy of it, or some route that only borrowed the tower's shape. The water running below them sounded real enough. That was not useful.
At one point, Nia stopped beside a corroded valve wheel mounted to the wall. She did not touch it. A line of faded red paint led from the wheel into the pipework and disappeared below the next slab.
"Do you know where it goes?" Kai asked.
"No."
"Then why stop?"
"Because it looks dangerous even without a prompt telling us so."
She moved past it.
Kai followed, more carefully. The blue scan above them reached the valve a moment later. It washed over the red paint, then continued down the ladder.
His shoulder seized when he reached too far. His bad foot slid off a wet rung and hit the side rail. The sound bounced through the shaft. Nia stopped below him each time, waiting without turning around. She did not tell him to hurry. The blue light did that for her.
They passed a broken emergency speaker mounted to the concrete. It had no grille, only a torn circle of wire and a faded label underneath.
FIRE CONTROL RISER
The letters were ordinary. Printed before the System had ever put blue words on a wall.
Kai touched the edge of the label with two fingers as he went by. It did not react. Neither did the red line in his wrist.
That was almost a relief.
Then the ladder ended.
Nia stopped so abruptly that Kai nearly stepped on her hand.
Below her was a square maintenance landing no wider than a closet. A sheet-metal door covered one wall. The other three walls were concrete, wet with old condensation. A narrow gap opened in the platform directly in front of the ladder.
Three rungs were gone.
The remaining ladder continued below the gap, its upper bolts bent outward as if something had torn the middle section away. The next intact rung was just beyond Kai's reach. Beneath it was darkness and the faint sound of water moving through pipework.
Nia put one boot on the landing and tested the metal door. It did not turn.
"Locked?" Kai asked.
"Welded."
She ran her fingers over the seam. Three rough beads of old weld held the door to its frame. The handle turned freely in her hand, attached to nothing. There was no keypad, no blue panel, and no gap large enough to work a tool through.
Kai leaned sideways to look at the broken ladder section. The landing was small enough that his knee knocked the wall when he shifted. Below the missing rungs, the lower ladder hung straight for several feet before it vanished into dark. A galvanized cable ran beside it, fixed to eyelets in the concrete. The cable was coated with dust and orange corrosion. It might have been a fall-arrest line once. It might have been dead weight.
"Can you use that?" he asked.
Nia looked at the cable, then at the gap. "With a harness."
"We do not have one."
"I noticed."
She crouched and pressed one hand against the platform edge. The metal flexed under her palm with a dry groan. She pulled her hand back at once.
"The landing is loose," she said.
Above them, another blue band reached the last intact rung. It did not cross the break. It spread across the concrete wall instead, probing the welded door and the rusted cable.
COLLECTION ACCESS: SHAFT
The words appeared above Nia's shoulder.
Kai felt the fob timer pulse against his ribs. He could try the junction box again, if there was another contact below. He could put the fob into something that wanted a source object and hope it gave them a way through.
That was how the route had kept taking pieces from them.
Nia followed his glance toward the dark below. "Do not use the fob unless it is the only thing left."
"We are getting close to that."
"Not yet."
He wanted to argue. The blue scan was less than a body length above them. The door was welded. The platform was loose. His injured foot had started to tremble from holding the ladder.
But Nia had spent her trace to get into the lift. Kai had spent ninety seconds to read a line. Neither of them had enough left to make guesses feel like plans.
He looked past her at the missing rungs. The gap was too far for him to step across with a bad ankle. Too far to hang from, not with his shoulder like this. Above them, the blue collection strips reached the last intact rung and began to crawl over the wall.
Nia looked up at him. "Can you make that?"
Kai looked at the remaining ladder, then at the fob timer in his pocket, counting down where he could feel it against his ribs.
"Not by myself," he said.