Centuria Books · Blood Oath of the Cartel: Darkness Binds them. Passion Defines them.
Blood Oath of the Cartel: Darkness Binds them. Passion Defines them. — Read the First Chapter
El Diablo of the cartel meets the monster in his rafters — and the only power she can’t kill him with is his own restraint.
Chapter 1
The rain came down sulfurous and heavy, drumming against the rusted fire escape in uneven sheets.
Seraphina crouched on the iron grid, motionless. Water beaded on her pale skin, tracing the sharp curve of her cheekbones before dropping into the dark throat of the alley below. Her wet hair had plastered itself to her neck and collarbones. She didn’t push it away.
The meatpacking district had its own smell even on a clean night. Tonight it was something else.
Voided bowels. Hot copper. The particular, acrid sharpness of terror sweated through skin in the final minutes of a life. The rain couldn’t wash it out. It rose up through the downpour in thick, insistent waves, and Sera’s nostrils flared against it—not with hunger. Something colder. A phantom tightening in her chest, the ghost of a muscle that no longer moved.
She blinked. The dark contact lenses scraped her corneas, that familiar, low-grade misery, synthetic plastic caging the predatory red of her irises behind a flat, forgettable brown. She’d worn them so long she almost didn’t notice anymore.
Almost.
Her thighs coiled and she dropped off the railing. Twenty feet. The impact was nothing—not a splash, not a whisper, just the faint protest of wet cobblestone beneath her boots.
Five bodies. A dead-end alley, and five of them.
Sera moved through it without hurrying. The hem of her leather trench coat dragged through the pooling mixture of rainwater and blood, and she let it. Her boots found the only clean patches of stone by instinct as she picked her path between the sprawled shapes, reading the scene the way she’d learned to read them across three centuries.
A severed head rested against the dumpster’s rusted flank. The man’s eyes were still open, whites blown red, jaw unhinged—whatever he’d tried to scream at the end had never made it out.
Her own jaw locked. Her fangs came down without permission, punching through the soft tissue of her inner lip. Dead blood, thin and metallic, spread across her tongue.
She crouched over one of the bodies and turned the face toward the weak light with two gloved fingers. The laceration was deep and deliberate—not frenzied, not a fight. Someone had taken their time. A crude serpent, a skull, carved into the dead cheek with something narrow. A knife tip, maybe. A ritual signature.
The Vargas Cartel.
She released the man’s chin. His head lolled back against the brick.
Three centuries of maintaining the Blood Oath. Three centuries of keeping this district clean, of ensuring the shadows stayed dark, of taking only what they needed from the fringes and leaving nothing behind for mortal authorities to find. The Sanctuary wasn’t sentiment. It was survival. Eighteen months of careful cultivation, and some cartel foot soldier had turned it into a butcher shop in a single night.
Mortals.
The word rose up in her mind with old, tired bitterness.
Then the wind shifted, and something else cut through the reek of the alley.
Gunpowder. High-end tobacco. Adrenaline, sharp and metallic, still hot.
A mile east, maybe less. They hadn’t gone far.
Sera straightened, tilted her face toward the churning sky for a single moment, and let the rain do what it could. Then she crossed to the adjacent wall, her gloved hands finding the slick brickwork, and climbed.
—
The warehouse smelled of wet concrete and cordite.
Alejandro rolled his shoulders, the charcoal Tom Ford settling back into place across the heavy span of his back. He didn’t look at the suit. He never had to. He knew exactly how it sat on him—had known since the tailor finished the second fitting and made the mistake of saying he’d never dressed a man like him before. He’d said it like a compliment. Alejandro had not responded.
He stood over the kneeling man and let the halogen light do what it did.
Harsh and swinging, it carved brutal shadows into the angles of his face. The ink climbing his throat—serpents, thorns, the marks he’d chosen one by one over twenty years of building something from blood-soaked nothing—caught the light in fragments. The white shirt beneath his jacket had taken some spatter during the night’s earlier work. He hadn’t changed it. There was no point yet.
Hector looked up at him with the eyes of a man who’d already understood. That was the worst part, Alejandro had always thought. Not the begging. The understanding, and the begging anyway.
“Alejandro—” Hector’s voice broke wet around the split in his lip. “*Por el amor de Dios.* The northern port. You can have it. All of it. Just—” He swallowed. “Show mercy. Please.”
Mercy.
The warehouse dissolved.
Michoacán in high summer, the air so thick with dust it coated your teeth. He was ten years old and the floorboards pressed splinters into his palms and the sunlight came through the slats in blinding, fractured bars. His father was in the courtyard. The great lion of the Vargas family, kneeling in the dirt with his guns lowered, speaking in a voice Alejandro had only ever heard used in church.
Mercy for the families, his father had said.
The sound the machete made going through bone was not what he’d expected. He hadn’t known what to expect. He knew now.
His mother made one sound. Then the automatic fire started, and she didn’t make any more.
Alejandro’s grip on the suppressed Glock tightened. The metal bit cold and precise into his palm.
“There are no deals, Hector.” His voice came out low, unhurried, vibrating with the particular calm that his men had learned to fear more than shouting. “There is only my territory. And the graves of the men who stood in it.”
Hector squeezed his eyes shut. His shoulders shook.
Alejandro raised the weapon and pulled the trigger.
The suppressor muffled most of it. Not all. The body went forward and stayed there, a pile of expensive cloth and cooling meat on the stained concrete. Alejandro watched it for exactly one second, then ejected the magazine into his palm by reflex, checked the load, and slapped a fresh one home.
The hollow settling in his chest was familiar. Clean, almost. The violent hum beneath his skin had gone quiet.
“Jefe.”
Mateo came out of the shadows behind the shipping crates, eyes down—the right instinct, one of the reasons he’d survived this long. His gaze was fixed on the blood spreading toward Alejandro’s oxfords.
“The meatpacking district.”
“Done. Exactly as you said.” Mateo paused. Swallowed. “But the locals—the other outfits, the Russians, the Italians—they call it the Sanctuary. Nobody touches it. They say it belongs to the shadows.”
Alejandro turned his neck. The vertebrae cracked, one after another, a sharp percussion in the cavernous space. He holstered the Glock inside his jacket and adjusted his lapels.
“I am the shadows.” He moved toward the warehouse office, the glass wall overlooking black bay water. “I want the port. The alleys. The Sanctuary. If the Russians or the Italians have opinions about it, carve the serpent into their faces and leave them where the others were.”
“Yes, Jefe.”
He pulled the silver case from his breast pocket and extracted a cigar. Struck the match on the window frame. Held the flame to the tip until the draw caught, then exhaled the first lungful slow against the glass, watching the smoke flatten and curl.
The bay was invisible in the dark. He watched his own reflection instead—the set of his jaw, the ink, the stray fleck of blood at the corner of his collar he hadn’t bothered to wipe. He looked like exactly what he was. He’d stopped finding that troubling around the same age he’d stopped flinching at the sound of gunfire.
The hairs on the back of his neck stood up.
Not a sound. Not a movement anywhere in the building he could identify. Just the sensation, old as his first scar, of something lining up a shot he couldn’t see yet.
Alejandro went still. Didn’t reach for the weapon. Didn’t turn. Let the cigar smoke drift around his jaw and let his gaze travel, slowly, up through the reflection—past the concrete floor, past Mateo’s rigid shoulders, up into the tangle of steel I-beams and halogen glare and the thick, layered dark where the light didn’t reach.
Nothing visible. Nothing moving.
But the weight of it pressed against the back of his neck like a palm. Cold. Deliberate. Something looking at him the way he looked at men before he decided what to do with them.
The corner of his mouth moved. Not quite a smile.
He took a long, slow drag, let the cherry glow, and exhaled against the glass.
—
Sera stopped breathing.
She was balanced on a beam no wider than her boot, forty feet up, her fingertips resting against cold steel with a grip that had left shallow indentations in the metal. The scent of Hector’s blood was still rising, rich and layered, but she’d stopped registering it three minutes ago.
The man at the window had done that.
Alejandro Vargas. El Diablo. She’d pulled the name from the cartel’s own terrified lieutenants over the past two months, heard it spoken the way men spoke the names of things they couldn’t control—half curse, half prayer.
She watched him from the dark and understood why.
Even forty feet up, even filtered through halogen glare and cigar smoke, he radiated something. Not warmth—nothing so benign. Heat, yes, but the particular heat of friction, of pressure applied until something broke. His suit fit him the way a weapon fits a hand, every line of it mapping the contained brutality underneath. He stood over the body of the man he’d just killed the way other men stood in doorways. Like the space belonged to him. Like it had always belonged to him and the corpse at his feet was simply the universe catching up to what he’d already decided.
Something in Sera’s chest moved.
She catalogued it clinically: involuntary. The old predator instinct, recognizing something across the evolutionary gap—apex to apex, danger to danger. A low, resonant pull through her deadened veins, pooling heavy and unwelcome somewhere below her ribs.
She had spent a century burying that particular response under blood and silence and law.
He is mortal, she told herself. Flat, firm, the litany she’d used before. Fragile. Temporary. A lying creature of the sun.
But as he tilted his head and the halogen caught the ink wrapping his throat, the word fragile died somewhere between her teeth and refused to come out again. There was nothing fragile in him. No softness anywhere. The obsidian of his eyes, even refracted through glass, held the same cold patience she’d found in ancient things—in mountains, in deep water, in the particular stillness of a predator that has never once doubted its place in the hierarchy.
He had desecrated her territory. He had drawn mortal attention to the shadows she was sworn to maintain. By coven law, she should drop from this beam, cross the forty feet between them in under a second, and sever his spinal cord before his hand found the gun at his ribs.
Her muscles gathered. She ran the trajectory automatically: three seconds. Clean. Silent.
Then he shifted.
Not toward his weapon. Not toward Mateo. He simply lifted his chin and let his gaze travel up through the window’s reflection, steady and unhurried, until it landed—precisely, impossibly—on the patch of darkness where she crouched.
Sera’s breath stopped.
He couldn’t see her. The rafters were lightless, and she hadn’t moved in four minutes. She was shadow wearing skin. And yet his eyes found the exact spot and stayed there, fixed and patient, with the unhurried certainty of a man who has never needed confirmation.
The ghost of a smirk touched the corner of his mouth.
He raised the cigar. The cherry flared. He exhaled slow, smoke masking his reflection for one beat, and when it cleared, he was still looking directly at her.
Sera’s fingers pressed deeper into the steel. A low groan moved through the beam, barely audible.
Every mortal she had hunted across three centuries had broken before it came to this. The powerful ones lasted longest, but they all fractured in the end—that primitive animal part of the brain recognizing something it wasn’t built to face, the begging starting however much their pride tried to hold it back.
Alejandro Vargas was standing in the dark, watching the space where a monster crouched in his rafters, and his pulse hadn’t changed.
She could hear it from here. Slow, heavy, its rhythm altered not by fear but by something closer to interest.
The lie she’d been living inside for a hundred years—that mortals were vessels, interchangeable, their predictable fragility a comfort rather than a limitation—developed a hairline fracture somewhere in the space between his stillness and hers.
Her contacts scraped. The urge to rip them out, to let the red of her eyes burn through the dark and give him something real to look at, was physical—a clawing itch behind her cheekbones. She wanted to drop from the beam. She wanted to put her hands around that tattooed throat and feel what his pulse felt like against her palms, whether the heat of him was as overwhelming up close, whether the absolute control he wore like a second skin would fracture when a true predator showed him its teeth.
Vulnerability is death. Her sire’s voice, thin with ash and distance. Connection is the blade they use to open you.
Sera gritted her teeth. The memory of torchlight moved behind her eyes—soft hands, whispered promises, the blinding moment the torches appeared in the dark. The silver chains. The sound of her coven dying.
She dragged her gaze off the line of his shoulders.
She was an Enforcer. She didn’t indulge. She didn’t hesitate. She assessed, planned, and erased. Killing Alejandro here—surrounded by armed men, in the middle of a cartel power shift—would flood the Sanctuary with police and, worse, Hunters. The vacuum his death left tonight would be louder than he’d ever been alive.
She needed to dismantle the operation first. Isolate him. Pull the support out from under him brick by brick until she could end it cleanly, without leaving a ripple.
She gave herself one more second with him.
He was still watching the dark. Still perfectly still, the smirk faint and waiting, as though he had somewhere to be but was choosing to give the shadows in his rafters a little more time.
Sera shifted her weight backward and let the ventilation shaft take her. The cool night air sealed over her skin, pulling the reek of tobacco and cordite and blood away in layers as she moved. She didn’t look back.
Behind her, the steel beam released a long, low exhale as the pressure left it.
—
Alejandro lowered the cigar.
The weight lifted from the room the way a storm lifts—not gradually, but all at once, pressure dropping and air rushing back in. The cold that replaced it was ordinary warehouse cold. Damp concrete. Bay water.
He stood another moment, his gaze still on the dark above the rafters. Then he looked down.
His thumb found the serpent tattooed along his collarbone without him directing it there. He traced the ink slowly, thinking.
His pulse was elevated. He noticed that. It hadn’t moved during the execution, hadn’t moved during the drive over, hadn’t moved in response to the dozen things tonight that should have moved it. But now it beat slow and deliberate against the inside of his throat, a warning drum, the oldest part of his nervous system sending up a signal he didn’t have language for yet.
Whatever had been up there had not breathed. He’d listened for it, once the instinct spiked—had stood completely still and mapped the acoustic space of the warehouse with thirty years of trained attention. No respiration. No creak of shifting weight. Nothing. Just the absolute, unnatural stillness of something that had decided to be invisible and nearly was.
Nearly.
Because he had felt it. Not heard it, not seen it—felt it, the way he’d learned in Michoacán that you feel the knife before you see it. The weight of being studied by something that was deciding your fate.
And then it had gone, and left nothing behind but the faint, low complaint of stressed steel.
Alejandro turned from the window. His jaw set. He tucked the cigar between his teeth and exhaled through his nose, watching the smoke dissipate into the warehouse dark.
He had claimed this territory tonight. Everything in it was his. The port. The alleys. The shadows.
He tapped the ash from the cigar and watched it fall.
Whatever hunted in the dark above his new empire—he would find it. He would understand it. And like everything else that had ever made the mistake of thinking his world was available to it on its own terms, he would bring it to heel.
Nothing existed in his city that he did not own.
Not even the thing that didn’t breathe.
Chapter 2
The bass bled up through the floorboards in heavy, rhythmic waves, pressing against Sera’s ribs like a fist. A synthetic heartbeat. A mockery of the warm, pulsing things she hunted.
She hung motionless from the rusted iron of the ventilation shaft, fingers hooked around the brackets, body suspended above the VIP room’s brass grate. She didn’t breathe—hadn’t needed to in a century. The subterranean air moved over her anyway: cigar smoke gone stale, expensive tequila, the sour mineral edge of mortal greed seeping through the walls. None of it touched her. Nothing did.
Below, through the slotted brass, the targets sat in the blue wash of a laptop screen.
Marco and Diego. Vargas cartel, mid-tier. Alive, for another few seconds.
“Pause it. Right there.” Marco’s voice carried a tremor that his face probably didn’t show. “Zoom in on the alley.”
Sera’s jaw tightened. The deep ache in her gums announced the slow descent of her fangs, and she swallowed it back, forcing them down by sheer will. The metallic taste of her own saliva coated her tongue.
The screen showed a warehouse district, three nights ago. Grainy footage, but damning. Her, moving at speeds no human body could produce, eyes burning hot white in the infrared. A rogue fledgling’s throat giving way under her hands. Vampire law upheld. Vampire law exposed.
If that footage climbed the cartel’s chain of command—if the mortals understood what they were actually looking at—the veil would shred. And mortals, when genuinely terrified, did the only thing they knew how to do.
They burned everything.