THE LOYAL MECHANIC

The industrial outskirts of the city smelled of sulfur, burnt oil and rusting iron.

Freight train tracks cut through weed-choked lots, running parallel to the muddy river. Most of the factories here had shut down years ago, leaving cavernous warehouses of corrugated tin and cracked asphalt.

It was the perfect place to prepare for the end of the world.

I turned the SUV down an unmarked gravel road and kicked up dust until I reached a fenced compound with eight-foot razor wire. A faded metal sign hung over the gate: LIN HEAVY FABRICATION.

In my previous life, Maya Lin had been my closest friend from college. While I had foolishly poured my youth and money into pleasing Preston Whitemore, Maya had taken her engineering degree and buried herself in grease, hydraulic lifts and diesel engines. When the acid rain began to eat the city alive, Maya had loaded a customized flatbed with water filters, solar batteries and three drums of diesel, then fought across twenty miles of dissolving streets to reach my apartment.

She never made it inside.

This was a week before Preston locked me out, back when I was still inside and still trusting him. He refused to open the blast door, claiming Maya might bring contaminated runoff into the penthouse. I begged him. He turned up the music. Through the reinforced window, I watched a mob of starving scavengers pull Maya down and beat her to death with iron pipes for her fuel.

My throat tightened. My knuckles turned white on the steering wheel.

Not this time.

In this life, Maya would not die outside a locked door. She would stand behind three feet of hardened titanium with her hands on the trigger of the heavy guns.

I pulled up to the gate and honked twice.

A moment later, the side door of the main hangar swung open. A young woman stepped out, wiping grease from her hands with a dirty shop rag. She was tall and lean, in faded denim coveralls rolled to the elbows. Welding goggles sat on top of her messy black hair. A smear of soot ran across her cheekbone.

Maya.

She was alive. Her chest rose and fell with steady breaths. Her dark eyes were sharp and fierce.

She walked to the gate and eyed my luxury SUV with deep suspicion. When I rolled down the window, her jaw dropped.

"Aurora?" Maya blinked. "What are you driving? And why did my phone tell me a five million dollar wire just came in from your family's offshore trust?"

"Open the gate, Maya," I said calmly. "We have fifty-nine days."

Maya frowned and studied my face. She had an instinct for danger, and in three seconds she could tell something inside me had changed. Without another word, she unlocked the padlock, rolled the gate back and waved me through.

I drove into the hangar.

The space was enormous, four hundred feet long, with high steel trusses overhead. Industrial cranes hung from ceiling rails. Hydraulic lifts held stripped-down semi-trucks, armored vans and heavy agricultural machinery. Racks of steel pipe, plate and tungsten rod lined the concrete walls.

Maya shut the massive bay doors behind us and dropped a heavy deadbolt into place. Then she crossed her arms and stared at me.

"Alright, Bennett," she said, dead serious. "Start talking. You wired enough money to buy half the district, then sent a spec sheet that looks like it was drawn up by a paranoid prepper expecting World War Three. Double-layer grade-five titanium plating. Hermetically sealed air filtration. Three-inch anti-corrosive undercoating. What is going on?"

"Preston and I are getting divorced."

Maya did not even blink. "Good. He's an arrogant parasite. I told you that at your wedding. But dumping a useless husband doesn't explain why you need three all-terrain freight haulers armored for chemical warfare."

"Preston was just an annoyance." I walked over to a flatbed on heavy jack stands and ran my fingers over the raw steel chassis. "The real threat is coming from above. In less than two months, an atmospheric fracture will release an acid deluge that will dissolve this entire city. After that comes an eternal freeze. Supply chains will snap within forty-eight hours. Power grids will fail. Water will turn into liquid poison. The only people who survive will be the ones inside self-contained fortresses."

Maya walked up and looked straight into my eyes, searching for hysteria or delusion.

She found none.

All she saw was cold, calculated certainty. The look of someone who had already drowned in acid and felt her flesh slide from her bones.

"You're completely sane," Maya murmured, shaking her head. "That's the terrifying part. You believe every word." She let out a rough breath. "But believing it and it being true are different things, Aurora. Give me one reason. One thing you couldn't possibly know."

I thought of the corner of her old dorm room, and of the nights she had stayed up building things so she would not have to feel anything.

"Your father's welding mask hangs by the bay door," I said. "His initials are burned into the inside of the strap. You never told anyone you put it on when you're afraid, because you think it makes you look like a child."

Her face went still. Her fingers tightened around the shop rag.

"Nobody knows that," she whispered.

"I know a lot of things I shouldn't." I held up my phone. "Look."

The screen showed my balance, confirmed by Bennett Maritime's vault.

Total liquid balance: $72,480,000,000.

Maya sucked in a sharp breath, and her knees almost buckled. "Seventy-two billion? You liquidated the offshore holdings?"

"Everything that isn't bolted down. Paper money will be kindling by autumn. Gold and steel are the only currencies that matter now. I didn't come for your opinion, Maya. I came to hire the best structural engineer I know. I want three multi-axle rigs built to withstand acid that can eat through three inches of carbon steel. I want four-thousand-liter fuel bladders, independent water reclamation systems and reinforced run-flat solid tires. Can you build them?"

Maya stared at the screen, then at her empty shop bays.

A fierce, dangerous spark lit her eyes. This was a woman who lived for engineering challenges that normal people called impossible.

"If you have the money, I can build anything." Her voice dropped to a low growl. "Standard titanium won't hold against concentrated industrial acid for more than a week. We need ceramic-matrix composite armor over high-nickel steel. And we coat the whole underbody in a hydrophobic Teflon-polyurea sealant."

"Order it," I said. "All of it. Hire three shifts of trusted fabricators and pay them four times their normal rate. Work around the clock. I want the first rig running in twenty days."

"The raw alloys and rush freight alone will cost fifteen million."

I opened the wire portal and typed in her account number.

Twenty million dollars sent.

Maya's phone pinged. She read the notification, and her jaw tightened.

"You're crazy, Aurora," she whispered, a wild grin spreading across her soot-stained face. "You're completely out of your mind. And I love it."

She went to a heavy steel tool chest, opened a hidden bottom drawer with a brass key, and pulled out a thick black leather binder with a faded red stencil: TOP SECRET / DEFENSE MOBILITY PLATFORM.

She laid it on an oil-stained worktable and flipped it open.

Inside were detailed schematics for a modular all-terrain mobile fortress, with independent solar-diesel hybrid generators, electromagnetic perimeter plating and automated point-defense hardpoints.

"Where did you get this?" My heart skipped as I scanned the cross-sections.

Maya tapped the signature block in the bottom right corner.

"Three years ago, before I opened this shop, I was a lead structural consultant for Aegis Vanguard," she said quietly. "This was their prototype for a heavy mobile command bunker for catastrophic collapse environments. They shelved it because the materials were too expensive for commercial production."

I looked at the designer's name stamped in red ink beneath the seal.

Raymond Black.

The name hit my mind like a thunderclap.

The reclusive former special defense commander. The man who, in my past life, had carved out the only impenetrable survival sanctuary in the northern mountains while the rest of humanity turned into monsters.

"Can you build this platform so it docks directly into a fortified mountain base?" I asked.

Maya locked the bay door deadbolt with a click and picked up a heavy pneumatic wrench.

"Miss Bennett," she smirked, her eyes bright. "With seventy billion dollars behind you, I won't just build it. I'll build you a door the sky itself can't open."