A Salve for the Chromium

How much friction could a duelist's spinal plating absorb before ceramic sleeves fused straight to bone? Vespera Corvo intended to answer that question before the palace guard traced their bootprints into the lower rail yard.

Her left optic twitched, cycling through diagnostic amber. Behind her ribs, the auxiliary coolant pumps made a wet, sucking sound like an empty syringe. The air inside the subterranean mag-coach depot tasted of stagnant lubricant and curdled ozone, thick enough to cling to her teeth. Ten paces ahead, the service gate to Maintenance Bay Six stood locked behind a heavy pneumatic deadbolt. An imperial crest was stamped across the housing—the same imperial crest currently hunting them across the capital.

"The seal has an active tripwire," Orson Lindell said. He stayed three paces behind her in the corridor's damp shadows, his right hand wrapped in scorched linen, the brass cylinder taken from Scrubber Four bulging against the flank of his fern-weave coat. "If you force the latch, the depot siren will bring thirty guardsmen down the shaft."

"I am not forcing it," Vespera said. Her voice had the flat, dry rasp of a radiator running dry.

She unclipped the short dirk sheathed at her left hip. Kneeling before the control box, she slid the reinforced blade between the brass faceplate and the masonry. A duelist did not merely cut flesh; a duelist understood the balance of current running through steel. She traced the main conduit by the faint warmth bleeding through the stone until her dirk touched the secondary bypass relay. With a precise quarter-turn, she shorted the copper contact pins against the blade's insulated tang.

A dull pop echoed in the chassis. The pneumatic valve hissed, venting three days of trapped nitrogen into her boots, and the heavy iron door swung inward an inch. The depot's perimeter beacons did not flicker.

"Get inside," she told him.

Orson slipped past her without a word. Vespera dragged the iron barrier shut behind them, throwing the mechanical slide-bolts. The bay was narrow, barely wide enough for a decommissioned inspection cart and a rust-pitted steel workbench. Overhead, a single sodium strip hummed at low frequency, bathing the grease-stained walls in dull saffron.

Safe for the moment, but the heat inside her chassis was not waiting on politics.

Her HUD flared with intrusive scarlet text across her vision:

Vespera dropped her pack onto the bench and reached for the buckles of her dueling doublet. The reinforced leather was stiff with dried sweat and sewer brine. Unfastening the chest harness took four deliberate tugs of her gauntlets; every twist of her shoulders pulled hot iron across the skin of her back. She peeled the doublet away, tossing it onto the cart.

Beneath the leather lay the exposed architecture of the Iron Latitudes: segmented chromium bands bolted directly over her ribs, converging along the line of her spine into four vented cooling stacks. The metal was discolored, scorched a faint violet-blue from the emergency petal flush in the ballroom. A faint haze of heat rippled off her shoulder blades into the cool basement air.

"Sit," Orson said. He had already cleared the workbench, setting down three glass jars and a shallow stone mortar.

"My optics are down twelve percent," Vespera said, her back remaining rigid. "If Vance's runners breach the outer door, I need twenty seconds of clear vision to run them through."

"You will not have twenty seconds of anything if your dorsal stack melts your spine," Orson replied evenly. "Sit down, Corvo. You take orders from your dispatchers; take this one from a chemist."

She measured the flat confidence in his tone, then lowered herself onto the edge of the steel table. The cold metal beneath her thighs was a shock, but it did nothing for the fire banked along her vertebrae.

Orson set his mortar down. His burned right hand remained stiff, but his left moved with methodical grace. From a wax-sealed jar he spooned a mound of crushed frost-moss, followed by three drops of pale, distillation-grade moon-orchid extract. When he ground the pestle into the mixture, the air in the cramped bay sharpened immediately, smelling of alpine frost, crushed mint, and the cold bite of mountain stone.

"This is not standard machine grease," she observed, watching the glass vials clink against his fingers.

"Machine grease does not bond with live tissue," Orson said. He scooped a dollop of the pale, glistening paste onto his fingers. "Your exhaust manifold is anchored into living vertebrae. Synthetic lubricants would poison the marrow within a week. This will pull the thermal charge directly into the moss matrix."

He stepped behind her.

When his fingertips made contact with the base of her neck, Vespera's entire frame locked.

The salve was frigid, an icy shock against blistered steel, but the heat beneath his skin was human. The contrast sent an involuntary shiver rattling through her spine. Orson did not hesitate; he drew his fingers downward, spreading the thick ointment into the narrow seams where chrome met flesh. The paste hissed faintly, drinking the heat from her radiators and turning translucent as it soaked into the vent meshes.

A violent thrum ran through her visual field. Her HUD flashed with rapid, gold-bordered telemetry:

"Your pulse is accelerating," Orson noted. His voice came from directly behind her ear, quiet and entirely clinical, though his thumbs pressed firmly into the tight muscle beside her seventh cervical vertebra. "Does the emulsion burn?"

"No," Vespera said through her teeth. "The emulsion is acceptable."

"Then relax your shoulders. If you stay locked like an iron gate, the vents cannot expand to discharge the vapor."

He smoothed another strip of cold paste along the seam below her shoulder blade. His bare thumb brushed the unarmored skin along the curve of her ribs. The touch was steady, deliberate, and entirely lacking in the fawning deference capital courtiers usually reserved for duelists. Yet the System was not interested in professional decorum.

A chime rang in her skull, crisp and uninvited:

"Dismiss," Vespera snarled under her breath.

"Pardon?" Orson asked, his hands pausing at the midpoint of her spine.

"Not you. The interface."

Orson glanced down at his own wrist, where his field display was glowing with identical amber script. A faint twitch tugged at the corner of his mouth. "The System lacks a filter for professional triage. It interprets elevated body heat as courtship."

"It interprets any contact without drawn weapons as courtship," Vespera muttered, gripping the edge of the workbench. Her knuckles showed white against the dark alloy of her gauntlets. "Clear the lower stacks."

Orson worked down to the base of her lumbar casing. The hiss of boiling salve softened into a steady, rhythmic vent of cool, mint-scented steam. With every stroke of his fingers, the red haze clouding her left eye faded. Her optical telemetry shifted from angry crimson to clear, crisp gold. The agonizing pressure against her central processing core subsided, replaced by a weightless, cool numbness that spread from her spine into her limbs.

Vespera let out a slow, measured breath. The tightness in her neck was gone. She rolled her shoulders back; the chromium joints moved with fluid, silent perfection.

"Better?" Orson asked, wiping his salve-covered fingers on a clean linen rag.

"Functional," she said, though the relief felt dangerously close to luxury. She turned on the bench to face him. "Your palm is bleeding through the dressing."

"An occupational hazard," Orson said, wrapping the linen tighter around his blistered hand. "Moon-orchid extract has high surface tension. It took the skin with it."

Before she could speak, the sodium light flickered overhead. Not from power drain, but from a System pulse rippling through the bay's damp atmosphere. The console on the wall chimed in unison with their retinal displays.

A wide, persistent banner locked across Vespera's sight line:

Silence descended over the damp repair bay.

Vespera stared at the amber letters hanging in the air between them. Then she shifted her gaze down to Orson Lindell, who was standing precisely two and a half paces away.

"Three paces," she said flatly.

Orson looked at his wrist display, then back to her unfastened combat harness. "The mag-coach to the Iron Latitudes has two-person sleeper berths. We will be well within the margin."

"If you roll over in your sleep and trigger a synaptic stall," Vespera said, sliding off the table and gathering her doublet, "I will stab you before the penalty registers."

"Noted," Orson said mildly. "Fasten your leather. The transit line departs in ten minutes."