Mercy had been still for less than an hour when the gauge moved again.
Oliver was beneath the engine, tightening a coupling that had not needed tightening, when the metal needle slid across the blank region. It did not rise toward fuel or sink toward exhaustion. It turned, deliberate as a finger, toward the rear of the train.
Toward the chained heart.
He climbed into the cab and found Nadia already there. Her gold core cast a thin light beneath her ribs. Tomas Venn stood behind her with his lamp hovering at shoulder height, while the woman with the ring watched the darkness through the side window. The child in the oversized coat had fallen asleep against the wall, one hand closed around the wooden horse they had reclaimed from the station.
“No,” Nadia said.
Oliver glanced at her. “I haven’t said anything.”
“You were going to follow it.”
The needle shivered. Far beyond Mercy’s rear carriage, the dark opened in a narrow, pale line. It was not the continent’s old gravity. That had dragged whole districts together, indifferent to the people inside them. This line appeared only where the gauge pointed, a track no wider than a rail and no steadier than a held breath.
Oliver rested his hand on the throttle. “The fragments are moving toward the network.”
“They are moving toward what they were taught to obey.”
“Some of them are separating.”
“Some.” Nadia looked past him, toward the receding wound where the spectral station remained hidden. “Edrin is still in there.”
The woman with the ring turned from the window. “And she is still asking.”
Her voice was rough from disuse. Oliver realized he had never heard her speak before.
“What is your name?” he asked.
She gave him a tired, almost amused look. “You waited until now?”
“I was busy getting you out.”
“No. You were busy not taking me out.” She touched the ring hanging from a cord around her wrist. “There is a difference.”
Tomas’s lamp brightened. “There is.”
The woman considered the question. Behind her, the child slept on, breathing softly as the train’s engine ticked.
“My name is Ossa Vale,” she said at last. “The ring belonged to my husband. I gave it to the heart when I decided grief was too heavy to keep. I have not decided whether I want it back.”
The ring lifted from its cord and turned once in the air. It did not return to her finger.
Next
As Mercy helps the drifting fragment separate from the heart, Oliver must answer the furnace’s new question while Edrin continues asking the trapped people who they are.
Ossa looked toward the gauge. “Are we going back?”
He could have said no. Mercy had survived the withdrawal. The first continent’s narrow gravity strip still held beneath the wheels, and the train had three new passengers who needed time to learn the shape of their lives outside the heart. Returning would put all of them near the mechanism again.
But the mark was not a command. It was a route waiting for another answer. If he ignored it, the answer would not become safer. It would only belong to the heart by default.
“We’re going back,” Oliver said.
Nadia’s jaw tightened. “For Edrin?”
“For the people who haven’t been asked.”
“And if they do not want us there?”
“Then we leave.”
“If the continent tries to pull us in?”
“We cut the route.”
She watched him for a long moment. “You are asking me to connect Mercy to a moving fragment.”
“I’m asking whether you want to help.”
That answer cost him less than an order and more than a request. He could feel the old instinct waiting beneath his ribs: calculate the safest course, decide for everyone, call the decision protection. The gauge had taught him what that instinct made of people.
Nadia placed her palm over the gold core. “I will help make a path. I will not hold the fragment together.”
“Agreed.”
“I will not choose for anyone inside it.”
“Agreed.”
“And if you decide we should retreat, you will tell me before you pull the train away.”
Oliver met her eyes. “I will.”
She turned toward the rear platform. Gold light spread from her in separate threads, touching the rails, the furnace housing, Tomas’s lamp, Ossa’s ring, and the child’s wooden horse. Each connection stopped at the object’s edge. None entered it.
The gauge’s mark answered.
A second line appeared behind Mercy.
Oliver eased the throttle forward.
The train did not reverse. It rolled along the new route, and the darkness folded around it. The first continent’s gravity strip fell away behind them. Ahead, fragments of the chained continent drifted through the void like pieces of a broken wheel. One held a row of houses. Another carried a school roof and three uprooted trees. A third was mostly stone, its underside wrapped in black chains that vanished into the distance.
Between them, small lights blinked.
Not signals from the heart. Voices.
Oliver opened the speaking tube.
“Mercy approaching. If you can answer, answer for yourself.”
For several seconds, there was only static.
Then a voice said, “We are the eastern quarter.”
The heart pulsed through the line, trying to swallow the words.
Oliver tightened his grip on the throttle. “That is not a name.”
The voice faltered. More voices rose behind it, overlapping.
“We are the eastern quarter.”
“We belong to the continent.”
“We cannot separate.”
Nadia’s threads trembled. The fragment ahead jerked toward the largest mass, dragging two smaller pieces behind it. A house tore loose from its foundation and began to rise.
“Ask again,” Ossa said.
Oliver looked at her. “You heard this before?”
“I heard the heart call my grief a district.” She took the ring in both hands. “It was easier than admitting it had my name.”
He spoke into the tube. “Not what you are called together. Who is answering?”
Silence spread across the fragments.
Then someone said, “Meren Holt.”
A point of gold appeared on the nearest roof.
Another voice followed. “Sella Trune.”
A second light kindled beneath the school roof.
The heart struck the chains. The whole mass lurched.
“No,” a third voice said. “I don’t know.”
A pale point appeared, wavering but present.
The route widened enough for Mercy’s front wheels to cross.
Oliver kept the train slow. Every chosen point became a separate support. Nadia did not gather them. She only connected what answered. The fragment’s pull weakened, though the chains continued to drag at its underside.
From the rear carriage came a sudden knock.
Not from the walls.
From inside the furnace.
The child woke with a cry. Their wooden horse fell from their hand and struck the floor. Once. Twice. A third knock answered from beyond the sealed firebox.
Oliver stopped the train.
The gauge needle swung hard toward the blank region, and the new mark split in two. One line pointed to the drifting fragments. The other pointed inward, toward Mercy’s furnace.
Nadia went still. “That wasn’t there before.”
Tomas lifted his lamp. Its flame bent toward the furnace door.
Ossa’s ring began to turn.
The child stared at the metal panel. “Someone is asking a question.”
The knock came again.
Oliver approached the furnace with one hand empty and the other held out where everyone could see it. He would not open the door alone. He would not decide whose burden waited beyond it.
“Who is there?” he called.
For a moment, the engine gave no answer.
Then a voice spoke from behind the sealed furnace, human and very far away.
“Who will carry the part that answered no?”
Oliver looked through the cab window at the separated continent, at the lights forming one by one where people named themselves. Behind him, Edrin was still asking. Inside Mercy, something had begun asking back.
He reached for the speaking lever.
“No one,” he said. “Not unless they choose it.”
The furnace fell silent.
Outside, the first fragment steadied on its new points of support. The chains did not break, but one of them slackened enough for a whole street to drift free.
Oliver returned to the controls. The route had not closed. It waited in two directions now.
He turned Mercy toward the voices in the fragment.
Behind him, Nadia remained beside the furnace door, listening for the next knock.