Chapter 56: INTO THE DEPTHS

The entrance to the abandoned metro tunnels loomed ahead like the mouth of a forgotten beast, hidden beneath layers of rusted gates and overgrown vines.

Naya adjusted her headlamp, the faint beam slicing through the darkness ahead. Cold air rushed from the tunnel mouth, thick with the scent of damp concrete and ancient dust.

“This is it,” she whispered, her voice echoing softly in the silence. “Beyond here… there’s no turning back.”

Kayode gave a tight nod, his weapon ready, senses on high alert. Amaka and Yemi followed close behind, their footsteps muffled by the cracked floor beneath them.

As they descended into the shadows, the city above faded away, replaced by the low hum of forgotten machines and the distant drip of leaking pipes.

The first few meters of the tunnel were eerily quiet, save for the occasional scurry of rats and the groaning of old steel beams settling overhead.

Yemi checked her scanner. “Minimal heat signatures so far… but the deeper we go, the more interference I’m picking up. It’s like someone’s jamming the signals ahead.”

“Tiwa’s preparing for us,” Kayode muttered. “She wants us blind in here.”

Naya paused at a rusted junction, examining the faded signs. “We split here. Kayode and I will head toward the control chamber. Yemi and Amaka, loop around to the power conduits. Cut the feeds Tiwa’s using to track us.”

Amaka frowned, nerves crackling beneath her calm voice. “Splitting up in a place like this? Feels like walking into a trap.”

Naya gave her a small, sad smile. “It is a trap. But we don’t win by playing safe.”

They exchanged a final look, each of them silently preparing for the possibility that not everyone would make it out.

Then they parted ways, footsteps fading into the darkness.

Kayode and Naya moved swiftly through the narrow passageways, their flashlights revealing old graffiti and collapsed support beams. The walls seemed to close in around them, pressing tight against their nerves.

“Do you trust her?” Kayode asked suddenly, his voice low.

Naya glanced sideways. “Who?”

“Tiwa. Back then. Before all this.”

Naya’s steps faltered. “I did. More than anyone. That’s what makes this harder.”

Kayode said nothing more, but the weight of her words settled heavily between them.

As they neared the final bend before the control chamber, Naya raised her hand, signaling him to stop.

A faint clicking echoed from ahead. Mechanical. Cold.

Turrets.

Before she could warn Kayode, a red laser beam swept across the passage, locking onto them.

“Down!” she shouted, tackling him to the floor just as bullets tore through the air above their heads.

The tunnel shook with the force of gunfire, dust and debris raining down from the ceiling.

And in the distance, over the static of the turrets, Tiwa’s voice crackled through the old speakers.

“Welcome home, Naya.”

The air vibrated with the sharp rattle of automated gunfire. Sparks danced against the tunnel walls as the turrets continued their merciless sweep, scanning for any sign of movement.

Pinned behind a rusted pillar, Kayode wiped the dust from his eyes. "Tell me you have a plan!" he shouted over the gunfire.

Naya’s mind raced. She studied the blinking sensors on the turrets—old models, likely still wired into the original metro grid. Vulnerable. If only they could get to the junction box...

“There!” she pointed toward a rusted service panel halfway down the wall, barely within reach. "If I can overload the circuit, it’ll trigger an emergency shutdown."

Kayode gave a tight nod. “Cover you?”

“Exactly.”

Without hesitation, Kayode fired a series of shots toward the turrets, drawing their attention. The lasers whirled toward him, unleashing another hail of bullets.

Using the distraction, Naya darted forward, heart hammering in her chest. She slid beneath a fallen beam and reached the panel, fingers trembling as she yanked the rusted cover free.

Inside, a tangled mess of frayed wires sparked dangerously.

“Come on, come on...” she muttered, pulling out a multitool and slicing through the main relay.

The turrets spun erratically, lights flashing red.

Suddenly, with a loud pop, the tunnel plunged into silence. The red lasers flickered... then died.

For a moment, the only sound was their ragged breathing.

Kayode lowered his weapon slowly. “You’ve still got it.”

Naya gave a shaky smile. “Remind me to retire after this.”

But before they could catch their breath, Tiwa’s voice returned through the crackling speakers, colder now, almost amused.

“Impressive. But every step you take brings you closer to your end.”

A sharp hum vibrated beneath their feet. Then the floor beneath them jolted violently.

Kayode grabbed Naya’s arm. “What now?”

With a low rumble, the ground beneath them gave way—

—and they plunged into darkness.

The fall wasn’t long, but the impact knocked the air from their lungs. They landed hard on a metal grate several feet below the main tunnel.

Groaning, Kayode pushed himself up, helping Naya to her feet. “Where... where are we?”

Naya swept her flashlight across the chamber.

Rows of old servers hummed softly in the shadows, their blinking lights casting eerie patterns on the walls. Thick cables stretched like vines across the floor, pulsing with life.

Her stomach twisted.

“This... this is the Helix Core.”

Kayode’s eyes widened. “We’re standing in the heart of the system.”

Above them, Tiwa’s voice whispered one final warning, soft and deadly:

“Welcome to the endgame.”

And then, the servers began to hum louder—as if awakening from a long slumber.

The countdown had begun.

The hum of the Helix Core deepened into a low mechanical growl, as if the ancient system sensed intruders in its veins.

Naya’s breath caught in her throat. This was never supposed to be activated. Not by Tiwa. Not by anyone.

Kayode scanned the server banks, noting the flickering red lights forming a pulse—steady, deliberate, almost like a heartbeat.

“She’s already inside,” he said grimly.

Naya nodded, forcing herself to focus. “But she hasn’t secured full control. Not yet.”

She rushed toward the main interface, brushing dust from the cracked touch screen. A password prompt flickered weakly before her. Her fingers hovered over the keys.

“What’s the plan?” Kayode asked, covering her back, eyes scanning the shadows for threats.

“If I can bypass the initial firewalls, I can lock her out long enough to shut down the core. But I’ll have to manually overwrite the system commands.” Her voice faltered slightly. “Once I start, she’ll know exactly where we are.”

Kayode’s jaw tightened. “Then we hold this ground. No matter what comes through those doors.”

Suddenly, an alarm blared—sharp, jarring—and from the far end of the chamber, an old security door hissed open.

Figures poured in.

Not soldiers.

Drones.

Sleek, spider-like machines scuttled along the floor and walls, their sensors glowing red, weapons armed and ready.

Kayode raised his weapon. “She really thought of everything.”

Naya’s fingers flew across the screen, code spilling faster than she could think. “I just need two minutes. Keep them off me!”

The first drone lunged, its mechanical limbs striking like a whip. Kayode fired, sparks erupting as the machine collapsed in a heap of twitching metal. But for every one he destroyed, two more advanced.

Over the comm, Amaka’s voice crackled through the static. “We’re almost at the conduit. Tell me you’ve found the core!”

“We’re here,” Kayode shouted between bursts of gunfire. “But we’re outnumbered. You need to shut down the drone network from your end.”

“Copy. Hold tight,” Amaka responded, urgency in her voice.

Naya cursed under her breath as the screen flashed an error. Tiwa was countering every move, sending malware crashing against her defenses like waves against a crumbling wall.

“Come on, Tiwa,” she whispered. “You taught me these tricks. You should’ve known I’d learn better ones.”

She rerouted the access points, launching a final override command.

The room trembled.

The drones froze mid-strike, their lights flickering.

And then, silence.

Kayode lowered his weapon slowly, breathing hard. “Did it work?”

Naya exhaled, sweat dripping down her brow. “For now. I bought us a window.”

But before relief could settle, the main monitor flickered, and Tiwa’s face appeared—cold, calm, undefeated.

“You may have slowed me down, Naya,” Tiwa said, her voice sharp as ice. “But this game is far from over.”

And as the screen glitched violently, a new countdown appeared.

00:29:57

Kayode stared at it, dread settling in his stomach. “What’s that?”

Naya’s face paled. “The system’s self-destruct protocol. If we don’t shut it down in thirty minutes... the entire core detonates. And it’ll take half the city with it.”