The Frozen Grate

The rime-ice on the north face of Mount Svetak did not crack when struck; it sheared into needles that found the seams of my wool-lined leather gloves.

Forty feet below my bootheels, the mountain road had already vanished under three feet of drift. The wind tore across the granite rib of the high sanctuary with the sound of a dry forge bellows, dragging the smell of sulfur and coming snow out of the lowlands. If the barometer in my breast pocket was accurate, the seasonal pressure drop would collapse within the hour. When that happened, the Vzork pass would be impassable for three months. Anyone left outside would turn to blue meat before midnight.

My left hand held a curved copper-alloy pick wedged into a hairline fracture between two ashlar blocks. My right hand patted down the buckskin roll tied across my ribs. Six steel tuning forks, three iron tension wrenches, a horn of mutton tallow, and a spool of braided horsehair cord.

The restitution of stolen relics was an occupation that required patience, quiet boots, and a total absence of common sense. The low-country courts called what I did burglary. I called it putting things back where greedy hands had torn them loose. When General Krenko took the capital and declared the dynasty dead without a body to prove it, he had stripped the cathedral vaults of every ledger and blood-relic he could lay his wagons on. But he had missed the one thing that proved true line: the blood-sealed astrolabe of the first Grand Duke, carried north three decades ago and hidden inside the high sanctuary of Svetakovar.

I had been hired by the surviving loyalists to put the astrolabe into a vault where it could be drawn under rightful law. If I failed, Krenko would crown himself on a throne made of forged decrees, and the seven provinces would burn in a three-way succession war before the spring thaw.

I pulled myself up another two feet. My boots found the narrow granite sill of the high ventilation grate.

The grate was cast iron, three inches thick, set into the dressed mountain stone like a portcullis. It served as the intake flue for the sanctuary’s lower furnace works, designed two centuries ago by the guild-engineers who fortified Svetakovar against siege. Between the rusted bars, a faint puff of dry, sulfur-scented heat leaked into the freezing gale.

I hooked my safety sling into the masonry ring above my head, took a shallow breath of frozen air, and knelt on the sill.

The locking housing was a rounded bulge of blackened iron, sealed with three flush-headed rivets and a central kinetic keyway. This was not a common tumbler lock that yielded to a rake and a tension hook. It was a weighted deadfall mechanism. If the pins were lifted out of sequence or forced with excessive torque, an internal counter-lever would trip, dropping four sheared steel wedges straight through the mortise. Once tripped, the grate could only be opened with a sledgehammer or six kegs of blasting black-powder.

I unrolled the buckskin wrap against my thigh and pulled out two forks: the heavy C-sharp and the narrow E-flat.

My fingers were stiff, the skin around my knuckles whitening with the cold. I clamped the long stem of the C-sharp fork firmly between my back molars. The cold metal tasted of zinc and oil.

With my free right hand, I took the small brass mallet from my belt and struck the outer rim of the iron lock housing.

The strike rang out with a dull thunk. Instantly, the vibration traveled through the stone, through the iron faceplate, and up into the steel prong resting against the mortise. From there, the harmonic pulse shot into the stem gripped between my teeth, rattling directly through my jawbone and into the inner canal of my ears.

To an untrained ear, it was just noise. To me, it was a map.

The first tumbler was iron, heavy and sluggish, humming at a low drone near the bottom of my jaw. The second was brass, ringing higher, sitting off-center in its sleeve. The third was bound in grease and did not vibrate at all, held fast by three decades of soot.

I swapped the fork in my teeth for the E-flat, adjusted my grip on the tension wrench, and pressed the flat blade into the shear channel.

I struck the housing a second time.

The brass pin bounced in its cylinder. I caught the vibration with the tip of my wrench, holding the pin against the upper lip of the barrel. One.

I worked the horsehair probe into the third slot, working the dried tallow into the soot-caked sleeve until the deadfall spring gave a soft, microscopic give. The hum shifted in my jaw, clearing from a muddy rattle into a clean, sharp chime. Two.

The wind hit the crag behind me, shaking my safety sling. Ice dust peppered the back of my neck, burning like hot grease. I ignored it, keeping my teeth clamped hard on the fork, feeling the internal balance of the counter-lever swing toward its tipping point.

Three.

The final shear pin settled into place. I twisted the wrench clockwise with a steady, four-pound pull.

The heavy iron deadfall did not drop. Instead, a series of internal gears clicked through their release cycle with the dry rattle of a clock running down. The entire grate shifted inward a quarter of an inch, the frozen seal of winter grease snapping like dry twigs.

I pulled the fork from my mouth, spat the taste of oil onto the stone, and exhaled a ragged cloud of steam.

Breaking into a fortress was supposed to be the difficult part. Returning something stolen was always three times more expensive in skin and knuckle-blood than taking it in the first place, mostly because dead architects had an annoying habit of designing locks that were easier to ruin than to pick.

I unhooked my climbing sling, pushed the heavy iron grate inward, and slid feet-first into the dark.

·  ·  ·

The air inside the flue was ten degrees warmer than the gale, smelling of ancient ash, pine resin, and cured pork.

I paused on the soot-covered ledge of the intake duct, pulling off my thick outer mittens and stuffing them into my coat. Beneath them, my hands were wrapped in thin, tactile kidskin. I tucked my tuning forks into their buckskin pockets, checked the sheath of my short-bladed pry-dagger at my hip, and listened.

The upper sanctuary was supposed to be empty. The monks of the Order of Svetak had abandoned the lower vaults thirty years ago during the First Cleansing, leaving only the old Vault Keeper to tend the hearths and oil the gears.

Yet the smell of roasting meat was fresh.

I moved along the horizontal conduit on hands and knees, keeping my weight on the reinforced stone stringers where the mortar was thickest. Fifty yards in, the conduit opened into an arched gallery looking down into the Great Lower Vestibule.

I flattened myself against the dark flagstones of the gallery, peering through the carved stone clover-trefoils that bordered the parapet.

The scene below stopped my breath cold.

The vestibule was a massive vaulted hall of black porphyry, sixty feet high, lit by three iron braziers burning pungent mountain pitch. Sledges loaded with supply crates, ammunition chests, and canvas rolls were lined up along the northern wall. Two dozen heavily armored infantrymen in boiled leather and slate-gray surcoats moved among the braziers, stacking barrels of lamp-oil and sacks of hard rye grain.

On their left shoulders, each man wore the badge of a jagged iron tower.

Krenko’s vanguard.

The usurper had not waited for the succession crisis to settle in the lowlands. He had sent an extraction force north before the mountain roads froze, and they had beaten me to Svetakovar by hours.

My gaze moved to the center of the hall, where a heavy oak table had been dragged between two braziers.

Standing beside the table was a man whose presence filled the high hall like an iron pillar. He was broad-shouldered and tall, clad in blackened tactical plate stripped of ornamental gilt. A straight-edged cavalry sabre hung at his left hip in a scabbard bound with raw rawhide. His face was angular, hard-bitten, with a sharp jawline darkened by three days of stubble, and cold gray eyes that took in the room with the precise, calculating stillness of a siege engineer.

Dragimir. The Usurper's Hound.

I had never seen him in the flesh, but every operative and courier from the capital to the border knew his reputation. He was the field commander who had breached the fortress of Dobrov without losing a single siege gun, a soldier who treated war as an exercise in ruthless arithmetic. He did not torture for sport, and he did not tolerate undisciplined slaughter. He simply removed obstacles with the cold efficiency of a butcher dressing beef.

At his feet, a lesser mercenary in a mud-spattered sheepskin coat knelt in the stone dust, his hands bound behind his back with copper wire.

Beside the kneeling man stood a woman with cropped iron-gray hair, a jagged scar splitting her left eyebrow, and a pair of serrated trench-knives strapped across her chest. Boryska, Dragimir’s chief lieutenant.

"He hid three canisters of whale-oil under the sledge floorboards, Commander," Boryska said, her voice rough as broken slate. She prodded the kneeling man’s ribs with the toe of a steel-capped boot. "Caught him trying to pry open the side gate before the storm hit. Desertion and theft of command rations."

The kneeling soldier looked up, his lips blue with cold and terror. "The blizzard is coming, Commander Dragimir! Three months in the dark with half-rations! We’ll freeze to the walls! I only wanted enough oil to reach the lower station!"

Dragimir did not raise his voice. When he spoke, the low timbre of his words cut cleanly through the crackle of the pitch fires.

"The mountain closed ten minutes ago," Dragimir said. His gray eyes remained fixed on the inventory parchment spread out before him on the oak planks. "There is no lower station. Anyone who sets foot on the descent now will be a frozen corpse in a ditch before he clears the second switchback."

"Commander, please—"

"You stole three units of fuel from the common store," Dragimir continued, his tone flat and devoid of malice. "In a siege of three months, three units of fuel equal twelve days of warmth for seven men in the garrison quarters. You did not steal oil. You stole twelve days of life from your comrades."

Dragimir turned from the table, looking down at the man. He did not draw his sabre. He simply gestured to two guards standing by the northern pillar.

"Strip him of his coat and weapons," Dragimir ordered. "Put him on bucket duty in the lower furnace flues. If the fires drop below operational pressure for even one hour, he does not receive his evening loaf."

"Commander, you should hang him from the rafters," Boryska muttered, her hand twitching toward the grip of her trench-knife. "Let the men see what happens to a coward."

"A dead man cannot shovel coal, Boryska," Dragimir replied coldly. "We need every pair of hands to keep the flues hot until the astrolabe is located and the vaults are secured. Get him out of my sight."

The guards dragged the weeping deserter toward the iron door leading to the cellar.

Up in the gallery shadows, I pressed myself tighter against the cold stone floor.

Dragimir was not here on a scouting mission. He knew the astrolabe was inside Svetakovar. He had brought two dozen trained soldiers, enough provisions to outlast the winter, and the absolute discipline required to turn this ancient sanctuary into an impenetrable fortress.

I was one woman with a set of lock-picks, a short blade, and three days of dried oats in my pack.

If I tried to search the lower vaults while his men held the corridors, I would be cornered and killed before I found the first arterial passage. My original plan to slip in, recover the astrolabe, and slip out before dawn was dead. The storm had sealed the outside; Dragimir held the inside.

To survive three months in this mountain tomb, I needed food, fuel, and room to maneuver.

I shifted my attention from the center of the hall to the western perimeter.

Just twenty feet below my gallery position, parked in the shadow of a stone archway out of direct line of sight from the main braziers, sat a secondary supply sledge. Its canvas cover was loosely roped. I could see the curved shapes of smoked mutton joints and bundles of tallow candles stacked in wooden crates. The guards near it were distracted, their attention drawn to the commotion around the deserter.

I looked at the stone columns flanking the gallery. A carved corbel extended five feet outward, directly above the rear of the sledge.

I reached into my boot, drew my horsehair cord, and tied a small three-pronged brass grapple to the end.

Leaning over the edge of the trefoil parapet, I swung the weighted hook in a tight, silent pendulum. On the third swing, I released it.

The brass prongs cleared the wooden rim of the supply crate with a whisper of contact, catching the stout hemp netting that held a bundle of cured mutton and a cloth roll of tallow candles.

I held my breath, testing the line. It took the strain.

With smooth, measured pulls, I hoisted the meat and candles upward. The cured meat weighed nearly eight pounds, smelling richly of salt, juniper, and hickory smoke. Inch by inch, the prize rose through the shadowed air toward the gallery.

Ten feet. Fifteen feet.

I reached out over the parapet, my fingers closing around the cold hemp wrapping of the mutton.

Suddenly, a metallic clink echoed from the floor below.

A loose candle had slipped from the torn cloth roll, dropping twenty feet straight down. It struck the iron rim of a brazier shovel with a sharp clack.

Down in the hall, Boryska’s head snapped toward the sound.

Her eyes, sharp and feral in the brazier light, tracked the vertical line of the empty air up to the gallery parapet.

"Intruder in the rafters!" she bellowed, her right hand whipping a heavy iron throwing knife from her belt. "Archers, focus high!"

The iron knife sliced through the air, striking the stone clover-trefoil an inch from my left temple with a shower of sparks and pulverized rock.

"Target sighted!" a soldier shouted below, the rattle of spanning crossbows echoing through the cavernous hall.

I did not hesitate. I hauled the mutton and candles over the railing, jammed them into the deep pockets of my climbing coat, and dropped low onto my belly.

Two crossbow quarrels slammed into the stone balustrade above me, shattering their steel points against the ancient porphyry.

"Do not let them reach the flues!" Boryska screamed. Her heavy boots thudded against the iron spiral stairs leading up to the gallery level. "Form a net at the north junction!"

Down on the floor, Dragimir had not shouted. Through the gap in the stone, I saw him take two paces back toward the central table, his hand resting on the pommel of his sabre. He did not rush up the stairs like Boryska.

Instead, his gaze swept across the gallery architecture with cold, analytical speed. He saw the layout of the upper flues in an instant.

"Close the blast portcullis," Dragimir commanded, his voice ringing like iron over the shouting soldiers. "Drop the outer intake counterweights. Seal the mountain."

"Commander?" the engineer at the winch station shouted. "The storm is already at gale force—if we drop the counterweights now, we won't be able to lift the iron gates until the hydraulic pumps thaw in spring!"

"Drop them," Dragimir repeated, his eyes never leaving the gallery shadows where I lay. "No one enters. No one leaves."

The engineer hammered the release dog on the massive wall-winch.

A deafening groan of ancient iron chains tore through the stone walls. High above my head, deep within the ventilation conduits, the thunderous roar of descending iron deadfalls began.

Massive slabs of counterweighted pig-iron slid down their vertical channels, slamming shut with a ground-shaking BOOM that rattled my teeth in my skull.

The blast gates were down. The intake flues were sealed.

The freezing draft from the mountain abruptly died, replaced by the dead, suffocating pressure of a mountain tomb.

Boryska’s boots were already halfway up the iron stairs, her trench-knives gleaming in the rising torchlight.

"Clear the gallery!" she snarled to her men. "Trap her against the deadfall!"

I scrambled backward on my hands and knees, dragging the stolen rations behind me. Ten feet down the narrow duct, a secondary service hatch opened into the vertical chimney flues leading to the upper residential tiers.

I hooked my fingers into the iron ring of the chimney hatch, hauled it open, and slid into the pitch-black shaft just as a crossbow bolt lodged itself into the floorboards where my boots had been a heartbeat before.

I pulled the iron hatch shut, dropped the locking bar into its slot, and leaned my back against the vibrating stone.

Outside in the hall, soldiers shouted and hammered against the iron plate. But they could not reach me through the narrow flue.

I sat in the absolute blackness of the chimney shaft, the taste of zinc and frozen rime still lingering on my tongue. In the pouch across my chest, the salt-cured mutton and the bundle of candles pressed hard against my ribs.

We were sealed inside Svetakovar.

Dragimir had his army, his weapons, and the main hall.

I had my picks, eight pounds of salted meat, and the dark passages of a fortress that did not want either of us to leave alive.

I reached up, tapped the cold steel fork against my teeth, and began the climb into the upper dark.