Evaluating the Residue

How many seconds did a steward have before the purgers sealed an airlock and vented a deck?

Three paces outside Suite Nine, the sirens tore through the mahogany paneling like copper drill bits. The vibration rattled my teeth. I pressed my back against the carved wainscoting, gripping my bronze tea tray like a shield. My uniform apron was damp at the hem. In the small watch pocket sewn inside the waistband, Baron Minato's stolen brass passkey pressed cold against my hip.

My ordinary life aboard the Kurogane had just collapsed.

For three years, survival had been a simple formula: brew harmless herbal infusions, polish the brass spittoons, and keep my head down while corrupt merchants drank themselves blind. But catching an ancient mist-vampire feeding in Suite Nine and pocketing a dead gambler's passkey had blown that quiet routine to pieces. The ordinary world was gone. I was no longer an invisible servant dodging bad tempers in the hallway. The sirens blaring above my head marked the point of no return: I was an accomplice harboring a predator, standing directly in the crosshairs of the ship's executioners.

Doors banged open down the promenade.

"What is that howling?" Lord Taneda shouted. He stumbled from cabin four in an unbelted silk dressing gown. His breath drifted across the carpet, heavy with opium tincture and burnt sugar. "Steward! Where is the purser?"

"An auxiliary pressure valve, my lord," I said, keeping my head bowed. "The engineering crew is already resetting the bypass."

Did I believe that? Not for a single second.

A sharp draft whipped down the companionway, carrying the bitter stench of scorched rubber and kerosene. It hit my nose like ground glass. My head throbbed, but the deep chill radiating from Shizuka's room still buffered my senses. The mist-vampire had left a quiet reservoir of mountain frost behind my ribs. Without that cold shield, the sour grease of Taneda's panic would have dropped me to my knees.

Why did terrified aristocrats always smell like rancid tallow?

Heavy boots struck the parquetry at the far end of the hall.

Three men marched into view through the haze. They wore matte-black rubber aprons and high brass respirators shaped like snout-nosed hounds. The purgers had arrived. At their head walked Commander Haruki, his dark tunic pinned with iron service badges. He carried no rifle, only a heavy pneumatic cane and a hand-cranked galvanic air sniffer.

The brass sniffer hissed with every step he took.

"Return to your quarters," Haruki barked. His voice rasped through the copper diaphragm of his collar. "Deck Three is under containment protocol. Any passenger impeding scrubber maintenance will be detained."

"Detained?" Taneda sputtered, waving a trembling, gem-studded hand. "Do you know who I am? I hold mining concessions in the western sink! You cannot bark orders at—"

Haruki did not pause. He drove the brass tip of his cane into the parquetry two inches from Taneda's slipper.

"The central air-intake lost four atmospheres of draw in nine minutes," Haruki said. His eyes were small, gray, and dead behind thick mica goggles. "Something sucked the pressure out of the primary manifold. If that obstruction is biological, my lord, this corridor will be flooded with dry caustic steam by eight bells. Now get inside."

Taneda choked on his own bile. The sour stench of his fear curdled into vinegar. He backed into his room and slammed the door so hard the brass numbers shook.

I tucked the tea tray tight beneath my arm and turned toward the service stairs.

"You there," Haruki's voice snapped.

My boots froze on the runner.

"Turn around, steward," the commander ordered.

I exhaled slowly, letting my shoulders sag into the beaten posture Miyako demanded of junior servants. When I turned, Haruki stood five paces away. His two subalterns spread out behind him, their heavy leather gauntlets resting on the brass valves of carbolic spray tanks.

"Commander," I murmured, keeping my chin down.

Haruki stepped closer. The air around him smelled of machine oil, vinegar, and cold copper filings. But underneath the grease lay dry, paranoid rage. It tasted like ash on the back of my tongue.

"Your apron is wet," Haruki observed.

"Spilled camphor tea, sir," I answered evenly. "Baron Minato took ill in Suite Nine. A sudden altitude convulsion. I had to loosen his collar and sponge his temples with eucalyptus oil."

Haruki raised the galvanic sniffer. The snout of the brass cylinder hovered near my chest. Inside the housing, a tiny glass tube held a thin silver needle suspended in amber oil.

I drew the hissing exhaust of the brass sniffer into my nostrils. Beneath the oily machine grease, my hyper-sensitive nose caught the faint, sulfurous tang of chemical litmus strips and vinegar reagents reacting inside the canister. The device was tuned to sniff out biological decomposition: the acidic moisture of dying lungs and the rank ammonia of biological rot. But the pungent eucalyptus oil I had dabbed on the baron and the spilled camphor tea were overwhelming the chemical intake. The hot medicinal steam choked the canister's reactive strips, making the silver needle drift aimlessly between me and the ceiling vents. The machine was built for crude decay, completely blind to the refined chill of an ancient predator.

A tiny knot of tension loosened in my chest. If medicinal oils blinded the hound, I had found their blind spot.

"Minato," Haruki muttered. He tapped his cane against his thigh. "The bankrupt fool from the southern bogs. Why is he in Suite Nine?"

I immediately seized the opening, angling the tea tray to invoke ship code before he could press further. "Under Head Stewardess Miyako's high-altitude protocol, any guest exhibiting respiratory distress is placed in the nearest ventilated salon under medical observation. I administered the mandatory tonic and sealed the suite to contain his convulsion."

"The Countess does not receive guests," a sharp voice interrupted.

Head Stewardess Miyako marched from the service pantry, her black skirt rustling with rigid discipline. Her hair was pulled back into a severe knot, pinned with steel needles. She carried an official brass clipboard, her sharp eyes darting between Haruki and me.

She smelled of stiff laundry starch and bitter tea. Beneath the crisp starch, I caught the faint, sour tang of anxiety. Judging by the scent, the purgers terrified her, but she seemed to catch my cue and used it to defend her domain.

"Commander Haruki," Miyako said, stepping smoothly between Haruki and my shoulder. "My steward followed protocol to the letter. We are conducting emergency medical service under standard high-altitude orders. You are alarming the paying passengers."

"Your paying passengers are breathing fouled air, Head Stewardess," Haruki countered. He stepped around her, his heavy boots crushing the carpet. "The pressure drop did not originate in the main duct. The flow monitors indicate an acute vacuum event along branch seven."

He raised his gloved hand and pointed the brass cane directly down the hall.

The tip pointed straight at Suite Nine.

"We are hunting a parasite," Haruki said, his voice dropping into a harsh rasp. "Something aboard this ship is bleeding the scrubbers dry, draining the heat from our bulkheads, and killing our pressure from the inside. We will scour every cabin until we drag that anomaly into the furnace."

My heart hammered against my ribs. The brass key burned against my hip.

There was the central mystery that would decide whether I survived this crossing: what was Countess Shizuka truly hunting aboard the Kurogane, and could a fragile human empath protect an ancient mist-predator without being consumed by her hunger? And what contraband had Baron Minato hidden in the sealed cargo hold that made him risk approaching an inhuman monster?

If Haruki breached Suite Nine, the purgers would butcher us both where we stood.

Haruki stopped before the double doors of Suite Nine. "The air around this sill is dead."

He crouched down. With a gloved finger, he touched the brass weather-stripping at the base of the door.

When he brought his hand up, a thin smear of frost glistened on the dark leather. It did not melt under the corridor's warm gas lamps.

Haruki stood up, his goggles flashing yellow in the gaslight.

"Frost," he whispered. "Sub-zero draw inside a sealed suite. Something in this room is drinking the warmth out of our iron."

He turned his masked face back toward me.

"Steward," Haruki demanded, his hand reaching out. "You hold the master pass for this wing. Unlock this door."

The hallway went dead silent, save for the dying moan of the sirens.

Miyako stiffened beside me, her knuckles turning white against her clipboard. If I handed over the key, Haruki would find Minato unconscious on the settee, reeking of drained spirit. If I refused, Haruki would put a carbolic nozzle to my head and blow the lock off the hinges.

"The Countess requested complete privacy, Commander," I said, my voice barely above a whisper.

"I am not asking," Haruki said. He took a heavy step toward me, the brass cane coming up to rest against my chest. "Open it. Now."