The Only One Left

I crawled away from the edge of the smoking ventilation shaft, my palms dragging across the rough concrete of the upper garage floor. The morning air outside was completely still, smelling of fresh pine and wet grass instead of the sweet, toxic vapor from below.

I sat back against a dented military utility truck, my fingers trembling as I reached up to unbuckle my backpack straps. I pulled out the digital map module that I had used to break Captain Ryker’s nose. The screen was cracked, but a small green indicator light was still blinking in the center of the dark interface.

The countdown timer read: 00:00:00. Dispersal Sequence Halted. Main Valves Offline.

"You did it, Garrison," I whispered to the empty room.

My voice echoed off the concrete walls, sounding tiny and hollow. I looked down at my hands. They were covered in grease, dried blood, and a thin layer of grey ash. There was no one left to patch me up. There was no one left to give me orders.

A sharp static crackle cut through the quiet, coming from the passenger side of the truck behind me.

I scrambled to my feet, my muscles aching as I walked toward the open cab door. The truck’s dashboard radio was flashing a single blue emergency beacon, its speaker spitting out a wave of white noise before a clear human voice broke through.

"This is Sanctuary Outpost Six calling any surviving regional command units," the voice said, sounding distant but steady. "The atmospheric cloud has broken over the northern ridge. The wind is clearing. We have secured a perimeter at the coastal border. If anyone can hear this broadcast, state your coordinates for immediate extraction."

I reached through the window, my fingers wrapping around the black plastic of the radio receiver. I pressed the talk button, the plastic clicking loudly in the quiet garage.

"This is Field Medic Valerie Kane," I said, my voice steadying as I spoke the name into the microphone. "I am at Depot One. The core is sealed. The countdown is finished."

The radio went silent for three long seconds. I could hear the faint sound of people shouting in the background on the other end of the line.

"Medic Kane?" the operator asked, his tone suddenly losing its professional military mask. "Did you say the core is sealed? What happened to Commander Vance’s squad? Where is Captain Ryker’s company?"

"They are gone," I said, looking back at the collapsed iron hatch in the corner of the garage. "Everyone is gone. I am the only one left on this mountain. Send the transport."

"Copy that, Valerie," the operator replied, the sound of keyboard keys tapping rapidly through the line. "We are tracking your beacon now. An armored vertical transport is launching from the coast. Hold your position for twenty minutes. Do not open the exterior garage gates until the detail arrives."

"I am not opening anything," I said, dropping the receiver back onto the cradle.

I walked over to the driver’s side of the vehicle, opening the glove compartment. Inside sat a small, standard-issue survival kit containing clean water vials, two packets of sterile gauze, and a single silver military compass. I took the water, cracking the seal with my teeth, and poured the cold fluid over my raw, blistered palms to wash away the grey ash.

Suddenly, a rhythmic thud echoed from the forest road just outside the main garage doors.

It didn’t sound like a vehicle engine. It sounded like something massive dragging its weight through the thick mud, followed by a low, vibrating clicking sound that rattled the metal panels of the garage gate.

I froze, the water vial slipping from my fingers and spilling across the floor.

The clicking stopped, replaced by a soft, melodic laugh that I would have recognized anywhere, even after the world had ended.

"You really thought you could seal me down there, Valerie?" Cynthia’s voice whispered from the other side of the thick steel gate.

The metal panel of the garage gate vibrated beneath my palm. The clicking from the other side grew louder, a rapid sound that sent a cold shudder straight down my spine. Cynthia was not just standing out there in the mud. She was testing the strength of the iron plates, her talons scraping against the bolts with a wet friction.

"Open the gate, Valerie," her voice came through the steel seam, the multi-layered echo lower and more distorted than before. "The air is beautiful out here. The storm is gone. Let me inside."

"You aren’t my sister," I said, my voice steady as I backed away toward the utility truck. "Cynthia died in the core. Leave the mountain."

"I am more your sister than I ever was," she laughed, a wet, snapping sound following her words. "I don’t need Father’s medicine anymore. I don’t need your matching marrow, Valerie. The inversion Thorne talked about? It didn’t make me baseline. It made me hungry."

I didn’t answer her. I reached into the bed of the utility truck, my fingers wrapping around an iron tire left behind by the mechanics. It wasn’t a rifle, but the cold weight of the steel in my hand was the only protection I had before the coastal extraction team arrived.

A sudden, violent crash shook the entire garage.

The center of the steel gate buckled inward, a deep dent appearing right at chest level. The rivets popped out of the concrete frame, flying across the room and bouncing off the stone floor like loose shell casings. Through the narrow gap created by the bent iron, a long, charred-gray arm reached into the room.

The fingers were thick, rock-like extensions ending in jagged bone claws that clutched at the empty air, searching for a grip.

"Twenty minutes," I muttered to myself, checking the digital clock on the truck’s dashboard terminal. The extraction transport hadn’t even cleared the coastal ridge yet. If I stayed in the center of the floor, she would tear the gate down before the rotors could even echo over the mountain.

"I can smell the water, Valerie," Cynthia hissed from the gap, her pupils appearing through the dark seam. She slammed her shoulder against the iron plate again, the metal groaning as the lower hinges snapped completely. "You washed the ash off your hands. You smell just like the clinic."

I scrambled into the driver’s seat of the utility truck, slamming the door shut and locking the manual bolt. The vehicle was old, but the chassis was reinforced military transport grade. I shoved the silver ignition key into the column, twisting it until the diesel engine coughed and roared to life with a deep, smoky vibration.

"Get back!" I shouted, slamming the gear shift into reverse.

I didn’t try to drive through the back wall. I targeted the primary structural pillar right next to the collapsing gate. If the roof support dropped, the concrete header would cave inward, trapping the entrance under three tons of solid masonry before she could widen the breach.

Cynthia saw the truck move. Her eyes widened through the gap, her jaw splitting completely open to emit a deafening shriek that shattered the glass windows of the garage office. She threw her entire weight against the remaining iron plate, her body blurring as she tried to force her torso through the narrow opening.

I hit the accelerator. The tires spun against the greasy concrete floor, smoke billowing from the wheel wells as the truck launched backward straight toward the concrete pillar.