In the forward lounge, a junior maintenance inspector stood alone beside the coffee station. Jun Park wore a dark uniform with an orange identification stripe. He had the haunted look of someone carrying a message he had been told was unimportant.
"Did you find the replacement relay?" Anika asked.
"Yes. But that's not why I came aboard."
He looked toward Harker, who had entered the adjoining compartment. "The water-level instruments at Mile Eighty-Four disagree," Jun said under his breath. "The automated feed says the drainage gallery is clear. The manual check from yesterday says the downstream sump is rising."
"How far apart?"
"Enough that the sign-off should be reviewed."
"Did you file an exception?"
"Twice. My supervisor marked the first duplicate. The second is still pending."
Anika had no authority to interpret an engineering discrepancy. She did have authority to report it. She sent a request to the dispatch desk, copying the safety officer, and received an automated acknowledgment. Jun watched her screen without relief.
"They know," he said. "That's the part that scares me."
At Seat Four, Mina opened her wooden box only far enough to check the foam around her prototype. Across the aisle, the woman in gray introduced herself as Bea Okafor, a local journalist on assignment to cover the train. She apologized for not speaking earlier. Mina appreciated the admission more than she would have appreciated an elaborate excuse.
"People freeze when someone important is rude," Bea said. "It's a poor habit."
"Is he important?"
"His money is. People confuse the two."
The train rushed past a dark stand of pines. Mina had expected the first hour to be a glorious blur of scenery. Instead she saw her own face reflected against black glass, her hands folded around the box, her throat still tight with a conversation that should have ended before it began. Somewhere ahead, the tracks climbed toward a place marked with a name she had seen once on an engineering map. Rook Cut. She remembered a shaded area representing a retaining wall, and beside it a note about seasonal groundwater. She searched her bag for the map without quite knowing what she intended to find.
CHAPTER 03
RAIN ON THE WINDOW
Rain reached the train just after supper. At first the drops traveled across the glass in long diagonal lines, making the outside lamps seem to swim. Then the wind turned and the drops struck straight on, loud enough to compete with the low conversation in the dining car. Mina pressed a finger to the window and watched the water divide around it on the other side, a private demonstration of a force that followed rules but never cared who understood them.
Her presentation was scheduled for the following afternoon in Northport. The judges had asked her to explain the wooden-box instrument in language investors could understand. She had spent weeks deleting technical words from the slides and adding them back. When an object was simple to use but difficult to describe, people either praised it too quickly or dismissed it because they did not know where to begin.
The device had started with her grandfather's basement wall. Every spring a dark patch appeared beside the electrical panel, and every spring Tomas painted over it. Eventually Mina had placed a cheap contact microphone against the plaster. She discovered that the wall sounded different after rain. From that observation she built a sensor that compared vibrations over time. It could not diagnose damage, and it could not replace an engineer, but it could help people know when to call one.
The competition judges had challenged Mina with a bucket of water and a hollow wooden panel. They asked what her device could prove. She explained that it could classify a departure from known conditions, not establish the cause. One judge deliberately loosened a fastening screw; another poured water down the back of the panel. Her prototype flagged both disturbances. The applause had pleased her, but the discussion afterward mattered more. Dr. Bell had asked what would happen if a sensor were attached to the wrong structural member. Mina answered that even excellent measurements could lead to terrible decisions without a reliable description of the installation. She remembered the question now because she had found it unfair at the time. She had wanted to talk about the cleverness of her code. The judge had insisted on ordinary things: mounting brackets, site drawings, temperatures, calibration dates, human checks. Mina had left the room slightly annoyed and had spent the following weekend rewriting the instruction booklet. That weekend's irritation now seemed like the very best part of the prize.
Across from her, Bea studied the photographs on Mina's tablet. "So it hears trouble?"
"It hears change. Trouble is what people have to investigate."