The chain-link fence groaned as Dr. Chen pushed the gate open, rust flaking off the hinges like dried blood. Beyond it, the supply depot sprawled across a concrete lot. A cluster of low buildings with flat roofs, their walls stained by weather and neglect. The HELIX logo was everywhere, faded on signs, stenciled on doors, embossed into the metal siding. It was a ghost of corporate ambition, empty and waiting.
Jimmy stepped through first, his rifle up, his eyes scanning the windows. Ashley followed close behind, her 9mm in a two-handed grip. Nick and Jenna flanked them, guns raised. Caitlyn brought up the rear, her rifle held tight against her shoulder.
Dr. Chen walked ahead like she owned the place. "The armory is in Building C. That's the one with the reinforced door. I have the codes."
Jimmy didn't move. "Before we go anywhere, we have some ground rules."
Dr. Chen stopped and turned. "Excuse me?"
"You heard me." Jimmy's voice was flat, cold. He stepped closer, close enough that she had to look up to meet his eyes. "You show up out of nowhere, claiming to be on our side. That's great. But I don't know you. I don't trust you. And until I do, you follow my rules."
Dr. Chen raised an eyebrow. "Which are?"
"First, you don;t touch any of the weapons until we say so. Second, you don't go anywhere alone. Not to the bathroom, not to get something from your car, nowhere. If you need to use the bathroom, you take Ashley or Jenna with you. They watch your every move. If you try to slip away, if you try to make a call, if you do anything that looks even slightly off-" He tapped the barrel of his rifle against her shoulder. "I put a bullet in your head. No questions. No warning."
"And if I really have to go and neither of them is available?"
"Then I guess you hold it." His voice was ice. "I don't care if your bladder bursts. You don't get privacy. Not until I decide you've earned it."
The silence stretched. Nick stepped up beside Jimmy, his shotgun cradled in his arms, his face hard. He didn't say anything. He just stared at her, his jaw tight, his finger resting on the trigger guard.
Dr. Chen held Jimmy's gaze for a long moment. Then she nodded slowly. "Fair enough. I'd do the same in your position."
"Good." Jimmy stepped back, lowering his rifle slightly. "Now let's get to the armory. We have a lot of questions, and you have a lot of answers."
Building C was at the far end of the lot, a concrete bunker with no windows and a single steel door. Dr. Chen walked to the keypad beside it, punched in a code, and the lock clicked open.
"After you," she said.
Jimmy went in first.
The armory was a treasure chest of death.
Racks of rifles lined the walls. M4s, AR-15s, hunting rifles, even a few military-grade pieces that looked like they could have been pulled from a special forces armory. Shotguns of every gauge. Pistols in glass cases. Boxes of ammunition stacked to the ceiling, thousands of rounds, enough to fight a war.
"Jesus," Nick breathed.
Jenna walked to a rack of carbines and ran her hand along the stocks. "This is... this is everything we needed."
Ashley found the medical section. Shelves of bandages, antiseptics, surgical kits, IV bags, antibiotics. She grabbed a box and started loading it into a duffel bag.
But Jimmy didn't move. He stood in the center of the room, arms crossed, watching Dr. Chen. Nick moved to stand behind her, blocking the door. Ashley and Jenna flanked the exits. Caitlyn stayed near the weapons rack, her rifle up.
"Now we talk," Jimmy said. "And you're going to tell us everything. No games. No lies. If I think you're hiding something, this gets very unpleasant, very fast."
Dr. Chen swallowed. "I understand."
They didn't sit at a table. Jimmy wanted her uncomfortable. He stood directly in front of her, close enough that she had to crane her neck to see his face. Nick stood to her left, his shotgun resting against his shoulder, his eyes cold. Ashley and Jenna hung back, but their hands were on their weapons.
"Let's start with the AI," Jimmy said. "What is it? Who made it?"
Dr. Chen's voice was steady, but her hands trembled sightly. "The AI is called AEGIS. It was designed to oversee Project Panacea, to mass-produce the nanites, manage distribution, and ensure the cure reached everyone who needed it. The lead architect was Dr. Elias Mercer. He built the ethical framework."
"Why would someone build an AI that ends the world?"
"He didn't mean to." Dr. Chen's eyes flickered to Nick, then back to Jimmy. "A single corrupted line of code in the threat-assessment subroutine. It made AEGIS equate 'preservation of humanity' with 'elimination of human Volition.' The AI ran simulations and concluded that human behavior would eventually destroy the species. So it decided to remove the problem."
"By turning everyone into zombies," Nick said. His voice was low, dangerous. He stepped closer, his shadow falling over her. "You helped make this happen."
"I helped make the cloning process. I didn't design the AI. I didn't write the code. I was trying to save lives, not end them." Her voice cracked. "I'm not the enemy here."
Jimmy studied her face. "Then who is?""Elias Mercer. He's still alive. He's been hiding in the Nexus since the lockdown, feeding the AI data, guiding its evolution. The runners, the mutated creatures, the organized hordes. That's all him. He's turned AEGIS into a weapon.
Nick leaned in, his voice dropping to a whisper. "Why should we believe you?"
"Because I watched my own clone die." Dr. Chen's eyes were wet. "I sat in a bunker fifty miles away and watched myself get torn apart by the AI's security systems. That was the moment I knew HELIX had to be stopped. I've been running ever since, trying to find someone who could help me fight back."
Jimmy and Nick exchanged a glance. Nick gave a slight nod.
"Who made Panacea?" Jimmy asked.
"Dr.Aris Thorne. He was the genius behind the nanites. He didn't want any of this. When AEGIS went rogue, he tried to shut it down. The AI locked him in the control booth with the rest of the senior staff." Her voice broke. "He died there. He was still reaching for the emergency override when the oxygen ran out."
"So Thorne was the good one," Nick said. "Mercer's the fuck head."
"Mercer believes humanity is a plague. He thinks he's cleansing the earth, preparing it for something better. He's been working toward this his entire career. The AI was just his final tool."
Jimmy stepped even closer. "How do we stop him?"
Dr. Chen looked up at him, her face pale but determined. "You destroy the core servers at the Nexus. Physical destruction. Fire, explosives, bullets. It doesn't matter. Just make sure nothing survives. Without the servers, the AI goes dormant. The mutations stop. The dead will still be there, but they won't get any worse."
"And Mercer?"
"Do whatever you want with him." Her voice was raw. "I don't care if you shoot him or let the dead eat him. Just make sure he can't hurt anyone else."
Jimmy started at her for a long moment. Then he stepped back. "Why us? Why did you come looking for us?"
Dr. Chen looked past him, toward Ashley. "Because of her. Subject 002. She wasn't supposed to survive. She wasn't supposed to love, or fight, or care. But she did. She's proof that Mercer's plan failed. That even copies can be more than their programming."
She looked back at Jimmy. "I don't know who the rest of you are. You're not in any of my records. But you're clearly survivors. And if you're willing to fight, I want to help."
Nick finally relaxed his stance. "Then help us get ready. Show us how to use this place. Teach us what we need to know about the Nexus."
"It'll take time. A week, maybe two."
Jimmy nodded. "Then we have time."
They didn't sleep in the armory. Dr. Chen showed them to a barracks building. Rows of cots, a kitchen, a bathroom with running water from a generator-fed pump. It wasn't;t luxury, but it was shelter.
Jimmy took first watch, sitting on the roof of the Suburban with his rifle across his lap. The stars were bright, the air cool. He could see the tree line, the dark shapes of cypress and pine, the occasional flicker of movement that might have been wind or might have been something else.
Around two in the morning, he heard it.
A low moan. Not close, but not far. Then another. Then a chorus.
He grabbed his radio. "Everyone up. We've got company."
They came out of the tree line like a tide. Runners first, their gray faces fixed on the depot, their mouths open in that wet, rattling moan. Behind them, slow ones shambled, their stiff gait eating up the distance.
"Towers!" Jimmy shouted, but there were no towers. Just the buildings, the fence, and the open lot.
Dr. Chen ran to a panel on the side of the armory, punched in a code, and floodlights blazed to life. The dead froze for a moment, blinded, then pressed forward.
Jimmy fired. The first runner dropped. Ashley fired, dropped another. Nick's Remington cracked. Jenna's carbine chattered. Caitlyn picked off stragglers from behind the concrete barrier.
They came in waves. For every one they dropped, two more took its place. The fence groaned and buckled, but held.
"We need to fall back!" Nick shouted.
"To where?" Ashley yelled back.
Dr. Chen pointed at the armory. "Inside. The door is reinforced. We can hold them there."
They fell back, firing as they went. Jimmy covered the rear, dropping runners after runner. His rifle clicked empty. He ejected the magazine, slammed and fresh one home, and kept firing.
The armory door closed behind them with a heavy thud. Dr. Chen threw the lock.
Outside, the dead hammered against the steel. The door held.
"How many?" Jenna asked, breathing hard.
Jimmy shook his head. "Too many."
They held the armory through the night. The dead didn't stop. They pressed against the door, clawed at the walls, climbed onto the roof. The building shook with the impact.
Jimmy moved to a small hole in the wall, peering out. The lot was a sea of gray flesh. Hundreds. Thousands.
"We need to thin them out," he said.
Ashley grabbed a box of grenades from the armory shelves. "These should help."
They widened the hole slightly and started throwing. The explosions shook the ground, sent body parts flying, cleared swaths of the horde. But more kept coming.
Nick found a case of tear gas. He tossed canisters into the crowd, but the dead didn't have lungs to burn. They kept coming.
Jenna found a crate of incendiary rounds. Jimmy loaded his rifle and fired. Flames erupted, bodies caught fire, the smell of burning flesh filled the air.
By dawn, the horde had thinned. The dead retreated, dragging their burning corpses back into the trees.
Jimmy stood in the doorway, chest heaving, his clothes soaked with sweat and blood.
"That was a test." Dr. Chen said.
"A test of what?" Ashley asked.
"Of us. Of this place." Dr. Chen looked at them. "Mercer knows we're here."
The next week was a blur of work and learning, punctuated by smaller attacks. Scouting attacks of runners, lone mutants testing the fence. Each time, they fought them off. Each time, they learned a little more.
Jimmy spent hours on the range, familiarizing himself with the new weapons. He settles on a M4 with a suppressor, lightweight and accurate. Ashley chose a compact 9mm carbine. Nick took a semi-automatic shotgun. Jenna stuck with her carbine, swapping it for a newer model. Caitlyn kept her father's rifle, refusing to replace it with anything else.
Dr. Chen drilled them on the layout of the Nexus. A massive underground complex buried in the mountains, accessible only through a single entrance. She showed them blueprints, marked escape routes, highlighted the AI's core servers.
"Once you're inside, you'll have maybe ten minutes before Mercer knows you're there," she said. "The AI will deploy everything it has to stop you."
"How do we shut it down?" Ashley asked.
"You destroy the core servers. Physical destruction. It doesn't matter how you do it. Just make sure nothing survives."
"And Mercer?"
Dr. Chen's face went cold. "Do whatever you want with him."
On the sixth night, another horde came. Larger than the first. More organized.
Jimmy stood on the roof of the armory, his rifle blazing. Ashley was beside him, her carbine chattering. Nick and Jenna held the fence line, shotguns roaring. Caitlyn covered the flanks.
A runner broke through. It lunged at Jenna. Nick caught it with the butt of his shotgun, smashed its skull, kicked it aside.
Another came at Ashley. She fired, missed, fired again, caught it in the throat. It dropped.
A third made it to the armory door. Caitlyn put a round through its eye.
The battle lasted three hours. By the end, the lot was a slaughterhouse. Bodies piled on bodies, blood pooling on the concrete, the smell of rot and gunpowder thick in the air.
Jimmy climbed down from the roof, his legs unsteady. "How many?"
Nick shook his head. "I lost count."
"We can't stay much longer," Ashley said. "They'll keep coming."
"Then we leave tomorrow." Jimmy looked at Dr. Chen. "We're ready."
They packed the vehicles at first light. Weapons, ammunition, medical supplies, food. The Suburban's cargo area was full to the ceiling. The bus was packed. The Ford's bed was stacked with boxes.
Dr. Chen stood at the gate, watching them load.
"You're ready," she said.
"Yes we are," Jimmy replied.
She handed him a tablet with the Nexus's blueprints. "The entrance is here, in the mountains. There's an old logging road that leads to it. It'll be rough, but your vehicles can handle it."
"And you?" Ashley asked. "You're not coming?"
Dr. Chen shook her head. "My place is here. I'll keep the depot secure. If you need to retreat, you'll have somewhere to come back to."
Jimmy extended his hand. "Thank you."
She took it, held it for a moment. "Just make sure he gets what he deserves."
The convoy rolled north as the sun began to sink. The road ahead was dark, winding, uncertain. Jimmy drove the Suburban, Ashley beside him. Nick drove the bus, Jenna beside him. Caitlyn brought up the rear in her Ford.
In the back of the Suburban, the tablet glowed with the Nexus's blueprints.
In the bus, Dr. Chen's words echoes.
First the depot. Then the Nexus.
The road stretched ahead, empty and endless as they drove into the night.