A colonel staged a public firing drill to humiliate a quiet clerk, unaware she had just performed an impossible marksmanship feat.

The crack of Emma’s rifle was different from that of any standard military weapon. Because her ammunition was loaded with an experimental, slow-burning propellant designed for sub-zero ignition, the report was not a sharp slap; it was a deep, concussive boom that resonated through the bedrock of the mountain like thunder.

Eight hundred and eighty yards away, the monolithic round struck the exact structural fault line of the frozen cornice.

The bullet did not merely chip the ice. The hydraulic shockwave of the supersonic projectile traveling at three thousand feet per second shattered the structural cohesion of the hanging shelf. For a split second, there was dead silence.

Then, the mountain roared.

Thousands of tons of blue ice, packed snow, and fractured shale detached from the sheer cliff face, plummeting downward in an unstoppable white cataract. The cascading avalanche obliterated the slope, burying the entrance of the Soviet drainage tunnel beneath thirty feet of compacted debris and creating a blinding cloud of snow dust that rose two hundred feet into the air.

"Direct hit on the entrance!" Donovan shouted into Emma’s ear. "Target area is completely sealed! Emma, did you crush him?"

Emma remained prone behind her boulder, her cheek welded to the carbon-fiber cheekpiece of the stock. Her breathing was steady, her pulse hovering at fifty-two beats per minute.

"No," she said calmly, working the bolt to eject the empty casing into the snow and chambering another round. "Kozlov is seventy years old, but he was trained by the elite scouts of the Soviet mountain divisions. He never occupies a position with only one exit. The tunnel wasn't his nest. It was his bait."

"Then where is he?"

Emma swept her crosshairs away from the ruined tunnel, aiming toward the high, jagged spine of rock behind it—an impossible crest called the Devil’s Tooth, an outcrop of pure black basalt that jutted into the teeth of the gale.

"He expected me to aim for the tunnel," Emma murmured, her crosshairs drifting across the howling void. "And when the avalanche fell, he expected me to celebrate. He’s up on the Tooth. He's been waiting for the snow cloud to clear so he can spot my muzzle flash."

Through the swirling vortex of white powder, Emma saw it.

It was not a silhouette. It was not a man.

It was a tiny, prismatic flare of refracted light—the briefest, most fleeting glint of anti-reflective coating on a German optical lens, catching the faint, gray daylight through the blizzard at a distance of eighteen hundred meters.

Before Emma could adjust her turrets, a supersonic crack whipped over her head.

The shockwave snapped inches above her helmet, tearing a trench through the snowdrift behind her. The sonic boom arrived a full two seconds before the dull rumble of Kozlov’s rifle reached her ears.

The round had missed her head by less than four inches.

"Sniper fire!" Donovan’s voice was frantic. "Acoustic sensors picked up a heavy report from the high ridge! Bearing zero-four-zero, elevation extreme! Carter, move! He’s dialing you in!"

Emma didn't move. She knew the fatal mistake of a marksman under fire: movement generated contrast. In a whiteout, a moving white target was ten times easier to track than a stationary one. If she broke cover and ran, Kozlov’s second round would take her in the spine before she took three steps.

"He’s using an 8.6 Black Arrow," Emma whispered, her voice chillingly clinical as she adjusted her elevation dial three clicks upward, compensating for the thin, freezing mountain air. "Hand-loaded solid copper projectiles. He knows my elevation. But he misjudged the lateral crosswind in the gorge."

"Carter, he’s not going to miss twice!" Donovan yelled.

"Neither am I," Emma replied.

Through the scope, she locked her reticle onto the black basalt outcrop. The wind was howling at fifty knots from her nine o'clock, but in the center of the ravine, a violent downdraft was spinning like a horizontal cyclone. To hit the sniper on the Tooth, she couldn't shoot at him. She had to shoot into the empty air two hundred yards to his right, letting the downdraft grab her bullet and drag it into his chest.

She rested her index finger on the two-stage trigger.

She exhaled half a breath.