“A lie,” he said with a grin. “The diagram said the path went from A to B. But corrosion made a detour. I just had to read between the lines.”

He cleaned the contacts with a small file, replaced the fuse, and turned the key.

He crawled into the rat’s nest of wiring behind the main panel, flashlight clenched in his teeth. There, tucked behind a bundle of aftermarket radio wires, was a small, black fuse holder. He pried it open. The 10-amp fuse was intact—but the holder itself was green with corrosion.

The steel hull of the Persephone groaned like a sleeping beast. Inside the engine room, the air was thick with the smell of diesel, brine, and old grease. Liam wiped his forearm across his brow, leaving a black smear. The Caterpillar C9 engine, the heart of the tugboat, sat silent and cold. Dead.

For three days, the Captain had been on his back. “It’s the fuel system,” he’d growled. “Or the injectors.” But Liam, a mechanic with thirty years of salt in his veins, wasn’t so sure. The C9 had cranked sluggishly, then not at all. The battery was fine. The starter was fine. But there was no heartbeat.

He pulled the crank sensor. It was clean. No metal shavings. He plugged it back in. Still nothing.

He sat on a overturned bucket, the rolled-up wiring schematic spread across his knees like a treasure map. The paper was soft from humidity, the corners dog-eared, and the lines—a tangled web of red, black, yellow, and blue—seemed to mock him. To a novice, it looked like abstract art. To Liam, it was the machine’s nervous system.