The desire to prevent the quagmire of a blazing fire requires that one acquires a potent fire extinguisher.

― Vincent Okay Nwachukwu, Weighty ‘n’ Worthy African Proverbs - Volume 1

Probationary firefighter Mills had worked the graveyard shift at Arkham Fire Department for three months when he first heard the knocking. It came from inside the apparatus bay walls-a steady metallic tapping that made his molars ache. Captain Cox, a grizzled veteran with burns up both forearms, just shrugged when Mills mentioned it.

“Old pipes settle funny,” Cox said, not meeting his eyes. “Don’t go opening the maintenance room after midnight, rookie.”

But Mills was curious by nature, and the knocking grew louder each night. It wasn’t steam hammer-he’d checked the boiler gauges twice. It wasn’t loose fittings-the city crew found nothing. It was deliberate, purposeful, like a distress call tapped out through radiator pipes.

On a particularly quiet Thursday, Mills took the ring of keys from the dispatch desk and crossed the bay floor. The maintenance-room door stood slightly ajar, though he distinctly remembered Cox locking it after last call. Inside, run logs lay scattered across the workbench, their pages blackened at the edges and stamped with times that hadn’t happened yet. Locker tags had been melted off from within, and the spare breathing masks hanging on the wall were full of soot.

The knocking came from the far corner, where the old cast-iron boiler squatted behind a line of valves. Its service panel hung open, and Mills’s flashlight beam revealed deep gouges in the metal-claw marks spiraling inward in nauseating patterns. Behind the burner assembly, something pale moved in the drifting steam.

Mills’s radio cracked with static, then Cox’s voice: “Mills? Mills, do NOT touch that panel. We’re coming across.”

But Mills was already looking. The thing in the boiler wasn’t flame-it was making smoke. Organic, wet, and wrong, it exhaled scenes of impossible fires: row houses that had never been built, victims who had never lived, engines warped by heat no earthly blaze could produce.

The department’s missing firefighters hadn’t resigned, Mills realized with dawning horror. They’d been sent where the bells pointed, one by one, to answer alarms from addresses that did not exist. Their final run sheets lay spread before him now, each ending with the same scorched warning: “The house takes what it saves.”

The knocking stopped. In the sudden silence, Mills heard Cox’s boots on the bay concrete, accompanied by others-too many boots for the small night crew. As the bay lights flickered and died, Mills understood that some calls never close because this station was never meant to fight ordinary fire.

It was meant to feed them.

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