The doors boomed shut with a metallic finality that echoed up the hollow shaft of the tower. Dust fell from the rafters like old ash. Carina didn’t flinch—she’d worked in tighter death traps—but every muscle in her back pulled taut beneath her subdermal armor.

  Her optics auto-adjusted.

  Low light.

  Humidity: 78%.

  Trace particulate: ash + carbon residue.

  Movement detected: none.

  For now.

  Her boots crunched over debris as she entered the lobby—what used to be one. Shattered holo-ad boards blinked sporadically, displaying corrupted ads: a smiling family glitching into faceless mannequins, a corporate logo mutating into static.

  The air felt… wrong.

  Stagnant.

  Carina’s hand hovered near her auto pistol.

  Get the relic. Leave. Get paid. Don’t die.

  Simple plan.

  Too simple.

  Inside Megatower 17

  The tower’s interior spiraled upward in a skeletal column. Steel beams crossed overhead like the ribs of a giant creature left to rot. Elevators were dead. Escalators rusted into jagged, useless tracks.

  But the worst part?

  Silence.

  Tokyo was never silent.

  Not unless something had killed the noise.

  Carina scanned the lobby again.

  Heat signatures: one.

  Source: Carina Chavel.

  She bit the inside of her cheek.

  “Feels like a damn tomb.”

  She pulled her shotgun free and stepped toward the service stairwell.

  When she reached it, the lights flickered—once.

  Something hummed awake.

  Carina froze.

  Then, from the far corner of the lobby, a voice croaked out through an ancient speaker system:

  “—He…lo…?”

  The distortion was thick, corrupted.

  Carina raised her shotgun. “Identify yourself.”

  No answer.

  Just static…

  and then a child’s voice, sweet and eerie:

  “Upstairs… come upstairs…”

  Carina swore under her breath.

  “Great. Haunted megabuilding. Just my luck.”

  She made her way up the stairwell, one level at a time, shotgun ready. Her Kiroshi optics tracked structural damage, the position of rusted pipes overhead, potential ambush points.

  Her RAM upgrade hummed gently—a little extra processing power if things went to hell. And they would.

  They always did.

  Level 3 — The First Sign

  The third floor landing was splattered with old blood. Dried. Brown. Years old.

  Unauthorized tale usage: if you spot this story on Amazon, report the violation.

  Someone had dragged a body, the streaks long and uneven.

  Carina crouched.

  The direction of the drag marks pointed deeper into the level.

  “Don’t follow,” she whispered to herself.

  She followed anyway.

  The hallway was lined with broken apartments. A holo-lantern flickered weakly at the far end, casting long shadows.

  Carina’s steps slowed.

  Her optics pinged…

  Movement.

  Something shifted in the room to her left.

  She swung her shotgun toward the doorway—

  —just as a figure stumbled out.

  Human-shaped.

  Thin.

  Too thin.

  Its limbs were stiff, jerky, like a puppet cut from half its strings. Its head twitched, turning toward her with a faint creak of bone.

  Carina’s eyes narrowed.

  “Not human.”

  Her optics zoomed.

  The thing’s skin was gray.

  Veins glowed faint blue.

  Its eyes were blank.

  A bio-synthetic hybrid.

  An old one.

  She’d seen these bodies before—used as cheap labor until their cyberware fried their brains. Most had been decommissioned decades ago.

  This one?

  Still walking.

  It shambled toward her and let out a wet, grinding moan.

  “Stay down,” she warned.

  It didn’t.

  Carina fired.

  The shotgun blast threw the creature back into the wall. Its torso erupted in sparks and metallic screeching. It seized, spasmed, then collapsed.

  But the sound awakened more.

  Doors along the hallway banged.

  Figures limped out—five, seven, ten of them.

  Eyes glowing faintly blue.

  Carina pumped her shotgun.

  “Hate these things.”

  The first sprinted.

  She fired—point-blank.

  Another jumped. She rolled beneath it, drawing her auto-pistol, emptying a burst into its spinal servo.

  She moved like a machine herself—clean, fast, precise. Her subdermal armor absorbed the glancing hits. Her smart link guided her pistol shots with deadly accuracy.

  But they kept coming.

  Carina grabbed the grenade from her belt, pulled the pin with her teeth, and threw it down the hallway.

  “Bon appétit.”

  The explosion shook the entire floor, flames erupting in a tunnel of heat and shrapnel. Synthetic limbs flew. The hallway filled with smoke.

  Carina spat dust from her mouth.

  “Yeah. Definitely a setup.”

  Level 12 — The Survivor

  By the time she reached level twelve, Carina was sweating despite the cold building. Her ammo was half spent. Her nerves were tightening like cables ready to snap.

  Level twelve was eerily intact.

  Clean.

  Organized.

  Lights still working.

  Carina stepped through the doorway cautiously.

  Something here had—

  “Don’t shoot!”

  She whirled, pistol raised.

  A man in a tattered business suit crouched against the wall, hands raised high. He looked like he hadn’t slept in days.

  Carina kept her weapon trained.

  “Identify yourself.”

  “I—I’m Arai,” he stuttered. “Kenji Arai. I was… I was hiding. They’re everywhere below—those… things.”

  “Why weren’t you killed?”

  “I stayed quiet,” he gasped. “They don’t react to stillness. Or maybe they just didn’t hear me.”

  Unlikely.

  But fear made people believe convenient things.

  Carina lowered the pistol slightly.

  “Did you contact me earlier? The creepy voice on the PA system?”

  He shook his head violently. “No. No, that wasn’t me.”

  “Then who the hell—”

  The lights flickered.

  A child’s voice echoed overhead again:

  “Come… upstairs…”

  Arai trembled.

  “That voice,” he whispered. “It plays on every floor. But I didn’t follow it.”

  “You’re smarter than most,” Carina said.

  Arai swallowed. “If you’re going up… take me with you.”

  Carina studied him.

  He was weak.

  Soft.

  A liability.

  “No.”

  “But—”

  “Stay here if you want to live. Move and you’ll die.”

  His breath hitched. “You don’t understand. Something’s in this tower. Something—”

  “I’ll deal with it.”

  She started toward the next stairwell.

  Arai called after her:

  “Whatever you’re looking for… it’s on the top floor. But you shouldn’t take it!”

  Carina paused.

  “…Why not?”

  “Because the tower changed after it arrived,” he whispered. “It infected everything. Machines. Systems. People. Whatever that relic is… it’s alive.”

  Carina’s heart kicked once in her chest.

  Alive.

  Not good.

  Not good at all.

  She turned away.

  “I’ll handle it.”

  And she moved on.

  Level 30 — The Heartbeat

  The higher she climbed, the colder the air became. Her breath fogged. Her skin prickled.

  The child’s voice grew clearer, less distorted:

  “Almost there…”

  “Come play…”

  “Bring it back…”

  Carina kept her weapons drawn.

  Her optics picked up faint electromagnetic pulses behind the walls—like a heartbeat.

  She reached the reinforced door leading to the top floor.

  The tower shuddered.

  Carina’s skin crawled.

  Whatever was behind that door wasn’t human.

  Wasn’t mechanical.

  Wasn’t anything Tokyo had words for.

  She placed her hand against the cold metal.

  It pulsed beneath her palm.

  Carina exhaled slowly.

  “Okay,” she whispered. “Let’s see what the hell you are.”

  She pushed the door open—

  —and stepped into a room bathed in blue light.

  At its center floated an object suspended by cables and electromagnetic beams—a metallic, insect-shaped capsule with wings like folded chrome.

  The Moth Relic.

  It pulsed like a beating heart, every throb sending tremors through the room.

  Standing beside it was a figure.

  Human.

  Female.

  Young.

  Black hair.

  Purple eyes.

  Carina stared.

  It was like looking in a mirror—

  except the woman’s expression was blank.

  Emotionless.

  Her voice was the child-like whisper that had echoed through the tower:

  “You finally came.”

  Carina raised her pistol.

  “…Who the hell are you?”

  The woman smiled faintly.

  “I’m what you left behind.”

  And every light in the megatower died.