Chapter 1 — The Awakening

  The first thing that touched her was the cold.

  It wasn’t the kind of chill that numbed the skin; it was deeper, older. It was the kind of cold that crawled through marrow and whispered a single, terrifying truth: You don’t belong here.

  Celeste’s eyes snapped open. For a long, agonizing minute, she believed she was blind. The darkness was a thick, velvety void that felt like it was pressing against her retinas. Then, the world began to bleed into color. Faint, ethereal threads of blue and violet began to drift through the water like underwater fireflies or the ghosts of shattered stars.

  The light didn't come from above. There was no sun here. It pulsed from the very water itself.

  Panic, sharp and jagged, pierced through her confusion. She tried to draw a breath, instead of the sweet rush of oxygen, her throat hit a wall of heavy, saline liquid. Her lungs flared in a primal scream for air. She thrashed, her limbs feeling heavy and disjointed, her mind flashing back to a memory of that one summer lake—the fear of sinking, the burn of water in the nose.

  But the burn never came.

  As she gasped, the water rushed into her chest. Instead of the drowning agony she expected, she felt a strange, cool relief. A rhythmic pulse settled in her torso. Her chest expanded with a terrifying ease, filtering the liquid through her body as if it were the most natural thing in the world.

  She wasn't breathing air. She was breathing the abyss. What. The. Fuck.

  "Am I... dead?" she thought. Her voice didn't exist. There was no vibration of vocal cords, no air to carry the sound. The words were just a hollow echo inside her skull.

  She raised her hands to her face, and her heart—or whatever was beating in her chest—stuttered. Her skin was a translucent, ghostly white, glowing with a soft, bioluminescent hum. But it was her hands that made her want to scream. Her fingers were longer, more elegant, and tipped with glassy, obsidian-like talons. They shimmered with a faint lavender light, looking more like precious jewels than parts of a living being.

  She touched her neck, feeling the skin ripple. Just below her jawline and along the curve of her ribs, thin, raw slits opened and closed in time with her pulse. Gills.

  A wave of visceral nausea rolled over her. She tried to double over, but her body felt... long. Too long. She looked down, and the last remnants of her sanity felt like they were fraying. Where her legs should have been—the legs that had walked city streets, worn high heels, and curled up on a sofa just... yesterday? an hour ago?—there was only a massive, powerful tail. It stretched out for feet, covered in pale lavender scales that caught the violet light of the deep. A wide, translucent fluke drifted lazily in the current, twitching with a mind of its own.

  [System initializing...]

  [Host recognized: Celeste.]

  [Race: Siren — Class: Unawakened.]

  [Survival Protocol Activated.]

  The golden text flickered in her vision like a HUD from a game she never asked to play. She stared at it, her heart hammering against her ribs—or whatever was left of them. "System?" she thought, her voice echoing only inside her skull. "And the fuck you mean Siren?" The thought was a jagged edge. "I'm a... a fish? A monster?"

  She remembered the mechanical hum of her air conditioner and the chewy, cardboard taste of a stale bagel eaten in a hurry. She remembered the blue light of her phone screen as she set it on the nightstand, forcing her eyes shut for a sleep she thought would end with an alarm clock. She didn't remember this. She didn't remember drowning in a nightmare that refused to end.

  "Change me back!" she screamed internally, her mind clawing at the golden text. "This isn't a game! I want to go home!"

  The System did not care for her grief. The golden lines flickered and vanished, replaced by a timer that began to tick down in the corner of her vision.

  [Quest initiated: Survive the Abyss.]

  [Objective: Reach the Luminous Trench.]

  [Time limit: 11 hours, 56 minutes.]

  [Failure: Dissolution of physical form.]

  "Dissolution?" she whispered mentally. The word felt like a death sentence. "You bring me here, turn me into this, and now you're going to erase me?"

  She tried to move, but her new anatomy was a foreign, hostile machine. She attempted to kick, and her tail responded with a violent, instinctive flick. The power was staggering. She shot forward like a torpedo, losing her sense of up and down. The water whipped past her face, cold and abrasive.

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  CRACK.

  She slammed into a ridge of jagged, obsidian-like coral. The impact should have broken her ribs, but her new body was denser, tougher. Still, white-hot pain flared in her shoulder. She scrambled back, her hands catching on the sharp edges of the reef.

  She looked at her wound. It didn't bleed red. A cloud of neon-lilac fluid drifted into the water, glowing brightly against the dark rock. She stared at it, mesmerized by the wrongness of it. Even her blood was an alien thing now. There was nothing left of the woman she used to be. Not even her blood was human anymore.

  The pain brought a sudden, sharp clarity. If she sat here and mourned, she would dissolve into this cursed water just like how her blood did. If she stayed in this spot, she was just bait.

  A low rumble vibrated through the water. It wasn't the sound of a current or a shifting tectonic plate. It was a growl, a deep, rhythmic thrum that she felt in her teeth.

  She turned slowly, her white hair drifting around her face like a cloud of silk. Beyond the immediate glow of the coral, the darkness felt alive. Something was moving out there. Something massive. A pair of distant, lidless red eyes flickered in the gloom, reflecting her own bioluminescence back at her.

  [Warning: Abyssal Entity detected.]

  [Recommendation: Flee.]

  "No kidding," she hissed to herself.

  Terror is a powerful teacher. Celeste stopped fighting the tail and started trying to feel it. She realized it wasn't an attachment; it was the core of her being. She tensed the muscles at the base of her spine and gave a rhythmic, undulating push.

  This time, she didn't spin. She glided.

  She darted between towering pillars of stone that looked less like natural formations and more like the skeletal remains of a city. These were ruins. Massive, barnacle-encrusted columns etched with runes that she didn't recognize, yet felt a strange tug toward.

  As she passed a particularly large slab of stone, her hand grazed it. Her glowing nails traced a spiral-shaped rune, and the world suddenly chimed.

  A low, resonant tone, like a cello being played in a cathedral, vibrated through the water and into her bones. The stone pulsed with a warm, golden light that pushed back the shadows for a dozen yards.

  [Siren ability unlocked: Resonant Touch.]

  [You can awaken dormant energy through physical contact.]

  The sound seemed to stun the creature chasing her. The red eyes vanished back into the dark, accompanied by a frustrated, wet hiss that sounded like steam escaping a pipe.

  Celeste didn't wait. She followed the flickering red arrow of the System's map, diving deeper. The pressure should have crushed her, but her Siren body seemed to thrive on it. The deeper she went, the more "right" she felt, as if the weight of the ocean was a warm embrace rather than a death sentence.

  She began to notice the beauty of the horror. Glowing jellyfish the size of houses drifted above her, their long, stinging tendrils like curtains of light. Strange, translucent fish with teeth like needles scattered as she passed. The abyss wasn't empty; it was a crowded, silent jungle. Something she never knew existed.

  [System notice: Level 1 achieved.]

  [Skill unlocked: Abyssal Voice.]

  She felt a strange tightness in her throat, a reservoir of energy. She looked back and saw the red eyes returning, closer now. The entity was a mass of oily black tentacles and a maw that seemed to unhinge into infinity.

  She didn't think. She opened her mouth.

  It wasn't a shout. It was a song. A single, piercing note that carried the weight of her fear, her anger, and her lost life. The water in front of her distorted, a visible shockwave of sound ripping through the current.

  The entity was hit full-force. It recoiled, its form shivering as if the sound were tearing it apart at a molecular level. It let out a screech that made Celeste’s ears ring, before it retreated into the deep trenches below.

  Silence returned, but it was different now. The ocean felt aware of her.

  Celeste floated there, her chest heaving, her violet eyes wide. She looked at her reflection in a shard of glass-like obsidian. She saw a predator. She saw a creature of legend.

  She hated what she saw. She missed her boring life. She missed her soft bed and her morning coffee. But beneath the grief, a small, dark part of her felt a thrill. She had survived. She had fought.

  Thump. Thump.

  A new sound. It was faint, drowned out by the hum of the ruins, but it was distinct. It wasn't the rhythmic growl of a monster or the chime of a rune.

  It was a heartbeat.

  Fast. Erratic. Terrified.

  [New signal detected.]

  [Lifeform: Human — critical state.]

  [System directive override.]

  [New Objective: Approach source.]

  Celeste froze. A human? Here?

  The thought of another person, someone who might speak her language, someone who was real, was like a lifeline thrown to a drowning woman. If there was a human down here, maybe there was a way out. Maybe she wasn't alone in this nightmare.

  "I'm coming," she thought, a fierce, desperate determination taking hold.

  She tucked her arms against her sides, streamlined her body, and with a single, massive thrust of her glittery tail, she dove headlong into the darkest reaches of the trench.