CHAPTER 20
PULSE
Arthur woke to the second real night of sleep since the facility.
Their safe house was a converted maintenance room—one corner of the larger transit hub they'd sectioned off for living quarters. Maybe six meters square, with a door that locked and walls that muffled sound. A cot with a mattress that had seen better decades. A workbench built from construction debris. The stolen power junction hummed behind its panel, their lifeline to the city grid above.
Three days since they'd arrived. Three days of learning control.
Stella sat against the far wall, legs crossed, her silver-gray eyes tracking nothing visible. Diagnostics, probably. Or calculations he'd never understand. The teal strand of hair caught the dim light—the mark she'd chosen to keep, the part of her the regeneration had tried to erase.
"Morning," she said without looking up.
"Is it?"
"Early still." She paused. "You slept well."
Not a question. She'd been monitoring his vitals. He'd stopped minding.
"Better than before." He sat up slowly, taking stock. The hunger was there—always there now—but manageable. Controlled. A whisper instead of a scream. "The straw technique is working."
"Show me."
He reached for the power bank on the workbench. Extended his hand. Focused.
Wisps of aurora-bright light began flowing from the device toward his palm. Slow. Controlled. The hunger purred in satisfaction, but he held the trickle to a whisper.
The most delicious meal in the world, and he could only take the smallest bites.
Twenty seconds. Thirty. The indicator dropped one bar.
He let go.
"Stable," Stella said. Something like approval crossed her features. "Your control is improving."
"The euphoria is still there. Still wants me to take everything." He set the power bank down. "But I can hold it now. Most of the time."
He pulled out a ration bar from his pack. Tore open the wrapper and took a bite.
The hunger that mattered couldn't be satisfied by protein and carbohydrates.
But he chewed anyway. There was comfort in the motion. The mechanical act of eating. Chewing felt relaxing, somehow. A habit from a life he couldn't remember but his body still knew.
he thought.
It made him feel human. Or maybe it was just boredom. He'd take what he could get.
Stella's head tilted. The gesture that meant she was receiving information.
"Someone's approaching," she said. "Through the eastern passage. Single contact. Moving fast but not running."
Arthur was on his feet before she finished speaking. His skin wanted to harden, wanted to form the obsidian crystals that meant protection. He pushed the transformation down.
Stella already had the Infernal Hand Cannon in her grip. She holstered it on her hip—keeping it close.
The sensor at the entrance flashed yellow. Movement detected.
Then a voice, thin and urgent: "Hello? I know you're in there. I'm alone. Please—I need to talk to you."
Arthur knew that voice. The girl from two days ago, when they'd practiced at the power junction.
* * *
Stella opened the door. The Hand Cannon stayed holstered but within reach.
Rada stood in the tunnel mouth, breathing hard. Fifteen, maybe. The scar running from her left temple to her jaw stood out pale against dark skin. Sharp eyes that had seen too much for her age.
She was alone. No weapons visible. Her hands shook slightly at her sides.
"You have guns," she said, looking at Stella's holstered weapon. "Real ones. Military grade. Not salvage pistols or sharpened rebar."
She glanced at Stella's silver-white hair, the too-perfect features, but didn't say more.
"I need help," Rada said finally.
"What kind of help?" Arthur asked.
"It's easier to show you." She reached into her jacket pocket. Slowly. "I'm just getting something. Don't shoot."
She pulled out a device. Small, rectangular. A basic tracking phone.
The screen displayed a steady pulse.
67 BPM.
"My uncle," Rada said. Her voice cracked on the word. "Dren. He went into the deep tunnels two months ago. Salvage run with three others. They didn't come back."
Arthur looked at the screen. The pulse was steady. Regular. Alive.
"If he didn't come back—"
"He was wearing this." She held up the phone like a talisman. "Paired tracker. We thought it was broken. For two months, nothing. Flatline. Dead signal." Her breath caught. "Then yesterday. It started again."
67 BPM.
"That's impossible," Stella said. "Two months without food, water, medical care—"
"I know what's possible." Rada's jaw tightened. "I also know what I'm looking at. That's his heartbeat. He's alive down there."
Arthur stared at the pulse. Something cold moved through his chest.
The deep tunnels. The ones he'd felt pulling at him since the first day. The darkness that whispered.
"Why us?" he asked. "Your community has fighters. People who know those tunnels better than we do."
Rada's eyes found his. Steady despite the fear.
"Because everyone who knows those tunnels is too scared to go back. And because..." She hesitated. "You're different." A pause. "I don't know who you are. But you're not just a man with strange mods."
Silence stretched between them.
"There's something else," Rada said quietly. "When the signal came back... it moved. Not much. A few meters. Like he was being... carried."
The cold in Arthur's chest spread.
* * *
"Wait outside," Stella said. "We need to discuss this."
Rada's face flickered with something—hope, fear, desperation all tangled together. But she nodded. Stepped back into the tunnel. Didn't argue.
Stella closed the door. Turned to Arthur.
"No," she said.
"You don't know what I was going to say."
"Yes I do." Her voice was flat. Professional. The tone she used when she was suppressing something beneath the analysis. "You want to help. Go into the tunnels that everyone warns us about. Risk exposure for someone you don't know."
"Stella—"
"Exposure risk. Any significant combat reveals our capabilities. If reports of someone with unusual abilities reach the wrong people—" She didn't finish. Didn't need to.
"I know the risks."
"Those tunnels aren't just dangerous. They're unknown. Whatever's down there—whatever took those people and is keeping them alive for two months—" Her voice dropped. "We have no tactical data. No escape routes. No backup."
"And if we don't go, her uncle dies."
"People die every day in this city. We can't save all of them."
Arthur was quiet for a long moment.
"But I have to do something," he said finally. "Something that isn't running. Hiding. Surviving." His hands clenched at his sides. "I've done terrible things, Stella. People are dead because of what I am—what I became. I can't undo that. Can't bring them back."
He met her eyes. Silver to silver-gray.
"Maybe I can't make it right. But maybe I can do something good. Something that matters. Even if it's just one person."
Stella was silent. Processing.
"This isn't logical," she said.
Enjoying this book? Seek out the original to ensure the author gets credit.
"No. It's not."
"It increases risk without proportional benefit."
"I know."
"I should refuse. Protect you from this decision."
"But you won't."
She looked at him for a long moment. Then her expression shifted—something softer breaking through the tactical mask.
"No," she said. "I won't." She touched the teal strand of hair. "Because I understand wanting to be more than what you were made for. More than what happened to you."
A pause.
"We do this together," she said. "Or not at all."
"Together."
She opened the door. Rada stood exactly where she'd left her, the tracker phone clutched to her chest.
"Tell us everything," Stella said. "Start from the beginning."
* * *
They moved to the main chamber of the transit hub—the larger space beyond their sectioned-off quarters. Rada sat on an old crate, the tracker phone on her knee. Arthur leaned against a concrete pillar. Stella stood, arms crossed, listening.
"Two months ago," Rada began. "Uncle Dren organized an expedition. Deep salvage. The kind of run that could set the Warren up for a year if it paid off."
"The Warren?"
"What we call our settlement." She shrugged. "It's just a name. Dren came up with it."
Arthur remembered the dwellers they'd met two days ago at the junction. The older woman with the weathered face. The enforcer with the shaved head and electrical tape wrapped around his knuckles. They'd been suspicious but not hostile. Protectors of their own.
"Four people went down," Rada continued. "Uncle Dren. A man we call Vek now—though that wasn't his name before. Lenn. And a woman named Carra."
"Vek and Lenn came back?"
"Eventually. Not the same." Rada's voice dropped. "Carra came back too. But she..." A pause. "She walked back into the tunnels two weeks later. On purpose. We never saw her again."
Arthur felt the cold spreading. "What happened to them down there?"
"They won't say. Can't say, maybe. Vek doesn't talk anymore—just draws patterns on the walls. Lenn talks too much, but nothing he says makes sense." Rada's grip tightened on the phone. "They were only down there for a few hours before they crawled out. A few hours—and look what it did to them. And when they came back..."
She looked at Arthur with eyes that had seen the aftermath.
"They said something held them there. Wouldn't let them leave. And all they had to do was listen."
67 BPM. The tracker pulsed on her knee.
"Your uncle," Stella said. "He wasn't with them when they escaped?"
"They said he was taken deeper. Separated from them early." Rada's jaw tightened. "They said the thing down there... wanted him specifically."
"Why?"
"I don't know. But Dren was always different. Sensitive to things others couldn't feel. He used to say the tunnels spoke to him." She looked down at the tracker. "Maybe they were speaking back."
* * *
The Warren was deeper than Arthur expected.
They followed Rada through a maze of maintenance passages, old transit lines, collapsed sections bridged with salvaged metal. The air grew thicker. Warmer. The hum of the city above faded to nothing.
And then the passages opened into something else.
Converted maintenance bays. Maybe a hundred meters of interconnected spaces, carved into something almost like a village. Jury-rigged lighting cast everything in shades of amber and blue. Small hydroponics setups glowed green against gray walls. A barter market occupied one corner—salvage spread across tables, people haggling in low voices.
Children ran between the structures. Playing with scavenged toys. Laughing.
Arthur stopped. Stared.
People lived here. Really lived. Built something in the space between the city's bones.
"Thirty-seven individuals," Stella murmured beside him. Her sensors had already done a sweep. "Twelve children. Four armed guards at obvious positions, likely more concealed. Small-scale agriculture. Water reclamation. This is a functioning community."
"Home," Rada said simply. "Such as it is."
An older woman waited at the center of the settlement. Arthur recognized her immediately—the woman from two days ago at the power junction. Early fifties, maybe, though the Sump aged everyone. Hard face, weathered by decisions that didn't allow softness. Gray-streaked hair pulled back tight. Eyes that calculated cost and benefit with every glance.
She hadn't introduced herself then. Just questioned them about the junction and left.
"Mara," Rada said. "My grandmother. She leads the Warren."
So. The suspicious woman from before. Dren's sister. Rada's grandmother. The pieces connected.
"Rada says you want to help." Mara's eyes moved between Arthur and Stella, assessing. "Why?"
Arthur considered lying. Considered strategic half-truths.
"Because I'm tired of being useless," he said instead. "Tired of hiding while people suffer. Your brother is alive down there. Maybe I can bring him back. Maybe I can't. But I want to try."
Mara studied him. Her fingers drummed against her thigh—a calculating gesture.
"Dren was always the optimistic one," she said finally. "Always believed people could be better than they are." Her voice cracked, barely. "I buried that part of myself a long time ago."
"Then let us try for both of you."
Silence. The settlement continued around them—children playing, people working, life persisting in the margins.
Then Mara laughed. Short, sharp, surprised.
"You actually mean it," she said. "I can't decide if that makes you brave or stupid."
"Probably both."
Another long moment. Then:
"If you're going down there, you need to talk to the survivors first. Vek and Lenn." Mara's expression darkened. "What came back from those tunnels... it's not pretty. But it's the only intelligence we have."
* * *
Vek didn't acknowledge them when they entered.
He sat in the corner of a small alcove, facing the wall. His hands moved constantly—fingers tracing patterns on the concrete. Spirals. Fractals. Shapes that seemed to fold in on themselves.
The walls around him were covered in the same patterns. Scratched into stone. Drawn in ash. Carved with fingernails.
Arthur noticed Vek's hands. The fingernails were gone. Torn away. The skin beneath was scarred and raw.
"Vek," Mara said softly. "These people want to help find Dren. Can you tell them anything?"
The hands stopped moving.
Slowly, Vek turned. His eyes were wrong—too wide, too hollow. The eyes of someone who had seen something that couldn't be unseen.
He looked at Arthur. Through Arthur.
"It hums," Vek whispered. The first words anyone had heard from him in weeks. "In the dark. In the deep. It hums and you listen because listening is easier than fighting."
Arthur felt the crystals along his spine vibrate. A sympathetic frequency. A response to something in Vek's words—or in the memory behind them.
"What hums?" Stella asked.
Vek's lips pulled back. Not a smile. Something else.
"The mother," he said. "The keeper. The thing that lives where the city forgot." His hands started moving again, tracing patterns. "It doesn't chase. It waits. It calls. And you go because going is easier than hearing the call forever."
Arthur swallowed. "I've felt it," he said quietly. "The pull. Toward the deep tunnels."
Stella's eyes snapped to him. He hadn't told her. Hadn't admitted it out loud until now.
Vek's head tilted. Interest flickered in those hollow eyes.
"Then you already belong to it," he said. "You just don't know it yet."
He turned back to the wall. His fingers resumed their endless tracing.
The conversation was over.
* * *
Lenn was the opposite.
He talked constantly. Words spilling out in a torrent that barely paused for breath.
"Blue lights," he said, rocking slightly on his cot. "Blue lights in the deep. Not electric. Not fire. Something else. Something that moved like it was alive." He laughed—high, broken. "Maybe it was alive. Maybe the whole tunnel system is alive and we're just parasites in its gut."
"Lenn," Mara said. "Focus. Tell them about the creature."
"Creature. Yes. Creature." Lenn's eyes darted between them. "Big. Six years dead. Six years. Standing there in the dark like a bad memory. No—not dead. Six legs. Six legs, not six years. See? See how it gets in your head?"
Arthur exchanged a glance with Stella.
"The lights," Lenn continued. "The lights make you see things. Hear things. Your friends turn into strangers. Strangers turn into friends. You can't trust your eyes down there. Can't trust anything." He grabbed Arthur's arm suddenly. "It herds you. Understand? Doesn't chase. Herds. Like cattle. Like—like—"
He released Arthur. Sat back. His breath came in short gasps.
"Three watches," he said, calmer now but not by much. "I had three watches when I went down. All stopped at different times. Time doesn't work right down there. Days feel like hours. Hours feel like weeks." He looked at his wrist. Three watches, still strapped there. All stopped at different times. "Dren tried to keep track. Before they took him deeper. He was counting. Always counting."
"Vek had a shotgun," Lenn said suddenly, like a memory surfacing unbidden. "Military surplus. Beautiful thing. Put three slugs into it at close range. Didn't even slow down. Nothing slows it down." His hands trembled. "Carra hit it with a torch—fire made it back off, just for a second. But it learns. It learns everything. Whatever you try, it remembers. Second time won't work as well."
"Where did they take him?"
"Down. Always down. Past the third junction. Past the old maintenance hub. Into the places where the maps end." Lenn's voice dropped to a whisper. "Into the places where the city forgot to build walls."
* * *
There was a third alcove. Empty.
"Carra's," Mara said. She stood in the doorway, not entering. "Before she went back."
Arthur stepped inside. The space was bare—a cot, a small table, a change of clothes folded neatly. But on the table, a book. Open. A finger still marking the page as if the reader had just stepped away.
He shouldn't look. It was private. A dead woman's last words.
He looked anyway.
Poetry. Handwritten. The lines were sparse, desperate:
Arthur closed the book. Set it down gently.
"She was the strongest of them," Mara said quietly. "Before. After... she said the silence was too loud up here. Said she could hear it better down there." A pause. "She walked into the tunnels at midnight. We found her footprints leading to the third junction. Nothing beyond."
"I'm sorry."
"Sorry doesn't bring anyone back." Mara's voice was hard. "But maybe you can."
* * *
They gathered in the Warren's central chamber.
Mara had assembled supplies. Emergency lights. Climbing gear. Medical kit. A hand-drawn map of the tunnels—as far as anyone had dared to chart.
"Griss made this," Rada said, handing Arthur the map. She nodded toward the shaved-head enforcer standing nearby—the same man Arthur had seen at the junction two days ago. "He knows the tunnels better than anyone. He wanted to go himself, but..."
"Voted against sealing them," Griss said. His voice was rough, unused. The first words Arthur had heard him speak. "Dren was my friend. But Mara made the call. Leader decides."
"The seal holds?" Stella asked.
"Held for eight weeks. Reinforced concrete. Motion sensors." Griss shrugged. "Whatever's down there hasn't tried to come up. Yet."
Arthur studied the map. The third junction. The descent routes. The places where the lines just... stopped.
"What can you tell us about what's down there?" Arthur asked.
Griss shook his head. "Only what Lenn's told us. And half of that doesn't make sense." He tapped the map. "I can tell you the tunnels. The routes. The places where people used to go before all this started. But what's actually down there now..." He trailed off. "That's something you'll have to see for yourself."
Stella touched the Cryo-blade at Arthur's hip.
"Extreme cold," she said quietly to Arthur. "If fire made it back off, thermal shock might work. But if Lenn's right about it learning..."
"We don't count on anything working twice," Arthur finished.
Rada approached with something else. A compass. Old brass, cracked glass. It didn't point north—the needle spun slowly, aimlessly.
"Dren's," she said. "It broke down there. Magnetic interference, maybe. But he always carried it." She pressed it into Arthur's hand. "Bring him back. Please."
Arthur pocketed the compass alongside the tracker phone.
"We'll do everything we can."
* * *
They stepped away from the others. A quiet corner. A moment alone.
"You didn't tell me," Stella said. "About the pull."
Arthur looked away. "I didn't want to worry you."
"I'm supposed to protect you. How can I do that if you hide things from me?"
"I'm not hiding. I'm just..." He exhaled. "Scared. Of what it means. That something down there is calling to me and part of me wants to answer."
Stella was quiet for a moment. Then she reached out. Touched his arm. A gesture that wasn't tactical. Wasn't calculated.
They stood like that for a moment.
Then Stella straightened. The professional mask slid back into place.
"Ready?"
"No. But let's go anyway."
* * *
The seal was impressive.
Reinforced concrete. Steel bracing. Motion sensors wired to alarms. Whatever the Warren had, they'd thrown it at this passage.
When they reached the seal, the community had gathered behind them. Faces in the dim light. Children held close. Hope and fear mixed in equal measure.
"Mara, you can't—" someone started.
"I can." Mara's voice cut through. "And I am. Griss, open it."
The enforcer moved forward. Began working the locks.
Arthur checked his gear. The Cryo-blade at his hip. Griss's map folded in his jacket. The tracker phone in one pocket, Dren's compass in another. Emergency lights. Medical supplies.
Stella had the Hand Cannon. Sensor equipment. Communication gear that might or might not work in the deep tunnels.
The locks disengaged. Metal scraped against concrete.
The seal opened.
Beyond it: darkness. Absolute. Complete. The kind of dark that seemed to have weight.
Arthur felt it immediately. The pull. Stronger now. Like a hook behind his sternum, tugging him forward.
Something down there was waiting.
Something that knew he was coming.
"Last chance," Mara said. Her voice was rough. "You can still walk away."
Arthur looked at her. At Rada, clutching the tracker phone. At the community watching with desperate hope.
"No," he said. "I don't think I can."
He stepped into the darkness.
Stella followed.
Behind them, the seal closed with the sound of finality.
67 BPM.
Somewhere in the deep, Dren's heart was still beating.
They were going to find out why.
— END CHAPTER 20 —
