Cover of A Vow of Blood and Night
Romance 18+ ★ 4.51 · 72 Audiobook Available Exclusive

A Vow of Blood and Night

by Lily Sutton

  • 1 hr 55 min read
  • 12 chapters
  • Published 25 June 2026
18+Vampire RomanceBlood Bond RomanceMortal & Immortal RomanceStrong HeroineBlood BargainIntellectual HeroineBetrayal RomanceUrban Fantasy RomanceConsent as ThemeCaptive RomanceTrust IssuesScientist HeroineDeception RomanceHidden SecretsStrangers to LoversCross-Species RomanceProtective HeroDark RomanceForbidden RomanceRedemption RomanceAlpha HeroMedical RomanceVampire Court PoliticsSecond Chance RomanceSecret Society RomanceForced ProximityPower Imbalance RomanceCure Quest RomanceBite RomanceScience Meets Supernatural
Read in the FreeBooks app

About this book

Summary

Cecily Dalton has spent years hiding behind microscopes and midnight shifts—until a trauma patient with no pulse sits up on her table and unravels everything she thought she knew about science, about herself, and about the predators who rule the city after dark. Her blood holds the key to saving an entire dying species, but that makes her either a savior or a commodity. Caught between a centuries-old vampire prince and the elder who wants to cage her, Cecily must decide what she's willing to bleed for—and who deserves to ask.

Read a preview

Chapter 1

Chapter 1: The Dead Man on Table Six

The fluorescent lights in Trauma Bay Three had been flickering for eleven days. Cecily Dalton knew this because she had submitted the maintenance request herself, twice, and because counting the flickers had become a private game during the grinding hours between two and four a.m., when the emergency department at St. Aldhelm's settled into its particular brand of institutional silence—not quiet, never quiet, but a held-breath hum of monitors and distant footsteps and the wet cough of the man in curtain nine who refused to go home.

She stood at the lab bench tucked into the corner of the hematology alcove, pipetting samples with the mechanical precision that had earned her a reputation among the residents as either brilliantly focused or pathologically antisocial. Both assessments were accurate. Cecily preferred blood to conversation. Blood was honest. It told you exactly what was wrong if you knew how to listen, and she had spent seven years learning its language—the whispered stories in cell morphology, the confessions hidden in coagulation cascades.

She was thirty-one, pale from years of night shifts, with dark hair she kept in a braid that hung between her shoulder blades like a rope she might use to rappel out of any situation that required small talk. Her eyes were the grey-green of river stones, and they narrowed now as she examined a slide under the microscope—a routine CBC that was anything but routine, the white cells misshapen in a way that suggested either a rare autoimmune disorder or a labeling error.

"Dalton." The voice belonged to Remy Griggs, the charge nurse, a broad-shouldered man with a shaved head and a gift for understatement that bordered on the pathological. He appeared in the doorway of the alcove with the expression he reserved for the genuinely strange. "We've got one coming in. Paramedics are losing their minds."

"Define 'losing their minds.'"

"No pulse. No temp. Still breathing—maybe. They can't figure it out. ETA two minutes."

Cecily set down her pipette. No pulse and no temperature but still breathing didn't make physiological sense, which meant either the paramedics were wrong or something was very, very interesting. She pulled off her gloves, snapped on fresh ones, and followed Remy down the corridor.

The ambulance bay doors banged open at 1:47 a.m., and the paramedics wheeled in a gurney carrying a man who looked like he'd been mauled by something with industrial equipment for teeth. His shirt—what remained of it—was black silk, now shredded and soaked with blood so dark it was almost purple. His chest was a ruin of lacerations, deep and ragged, and his face was turned to the side, sharp-jawed and pale as marble, framed by dark hair matted with gore.

"Male, unknown age, found in the alley behind Fournier Street," the lead paramedic said, her voice tight with controlled panic. "No ID. No pulse on arrival. Skin temp reads hypothermic but he's not shivering. Pupils fixed and dilated. We started fluids but—" She shook her head. "The blood won't clot. It's like trying to bandage a faucet."

Dr. Niamh Callister, the attending on duty, was already gloving up. She was a compact woman with steel-grey hair and the unflappable demeanor of someone who had seen everything the city's nights could throw at her. "Get him into Bay Six. Dalton, I want a full panel, cross-match, everything you can pull. Remy, call upstairs and tell them we may need a surgical consult."

Cecily moved to the gurney as they transferred the man to the trauma table. Up close, the damage was worse than she'd thought. The lacerations weren't random—they followed the lines of major blood vessels with a precision that suggested anatomical knowledge. Someone had done this deliberately. Someone who knew exactly where to cut to cause maximum blood loss.

She reached for his arm to draw blood, and her fingers closed around a wrist that felt like gripping a statue. Not cold, exactly. Not warm. Temperature-less, as if his body existed outside the thermal spectrum entirely. She pressed her fingers into the hollow where his radial pulse should have been and felt nothing—no flutter, no throb, no whisper of circulation.

And yet his chest rose. Barely. A shallow, intermittent expansion that could have been mistaken for the settling of a corpse if she hadn't been watching.

"This doesn't make sense," she murmured.

"What doesn't?" Niamh was beside her, stethoscope pressed to the man's chest.

"He has no pulse. His skin has no temperature. But he's breathing."

"People don't breathe without a heartbeat, Dalton."

"I'm aware."

Niamh listened for a long moment, then pulled the stethoscope away with an expression Cecily had never seen on her face before—not confusion, but something closer to unease. "I'm getting nothing. No heart sounds. No bowel sounds. Nothing."

"So he's dead."

"Dead people don't breathe."

They stared at each other across the body. Remy hovered at the foot of the bed, his hand on the crash cart, waiting for an order that made sense.

Cecily drew the blood. It came reluctantly, thick and dark, with a viscosity that made her think of syrup rather than plasma. She filled three tubes—purple top, blue top, red top—and held the purple-top tube up to the light. The blood inside didn't settle the way it should. It seemed to move on its own, swirling slowly against the anticoagulant like something alive and unhappy about being contained.

"I'm taking these to the bench," she said. "Something is very wrong with this blood."

She was halfway across the trauma bay when the monitors screamed.

The flatline alarm—a sound she'd heard a thousand times, the electronic wail that meant a heart had stopped, except this heart had never started, not since he'd arrived. Cecily turned. Niamh was reaching for the defibrillator. Remy was compressing the man's chest with the grim efficiency of someone who'd done CPR on bodies that were already beyond saving.

And then the man sat up.

He didn't gasp. He didn't cough. He simply rose from the waist like a door swinging open on oiled hinges, and his eyes—open now, and the color of old amber, almost gold—fixed on Cecily with an intensity that made the hair on the back of her neck stand straight.

Remy stumbled backward. Niamh dropped the defibrillator paddles. The room went silent except for the monitors, which were now shrieking contradictory data—no pulse, no temperature, but sudden electrical activity that shouldn't have existed.

The man looked down at his own chest, at the ruin of lacerations that were, impossibly, already beginning to close. The edges of the wounds were knitting together with a wet, organic sound, new tissue forming in real time like watching a time-lapse of healing compressed into seconds.

"That," he said, and his voice was low and accented—Eastern European, old-world, with the cadence of someone who had learned English when it sounded different than it did now—"was unpleasant."

He turned his gaze back to Cecily. To the tubes of blood in her hand.

"I'll need those back," he said.

"Like hell you will," Cecily heard herself say, and she wasn't sure where the words came from—some deep, stubborn place that responded to impossibility not with fear but with the furious need to understand it.

The man studied her. His eyes moved from her face to her hands to the tubes and back again, and something shifted in his expression—a flicker of surprise, quickly controlled, as if she had done something unexpected simply by not screaming.

"You're remarkably calm," he observed.

"I'm a hematologist. Calm is the job."

"And yet your heart rate is approximately one hundred and forty beats per minute."

"You can't possibly know that."

"I can hear it."

The room seemed to contract around them. Remy had backed against the wall. Niamh was reaching for the phone, probably to call security, possibly to call a priest. The man swung his legs off the table with fluid grace, and Cecily saw that his wounds were nearly closed now—minutes of healing compressed into the time it took to have a conversation.

"My name," he said, standing, and he was tall, taller than she'd realized, with the lean, predatory build of something designed for pursuit, "is Bastian Czernov. And I need to leave before the people who did this to me realize I survived."

"You need to stay and let us—"

"Dr. Dalton." He read her name tag without looking at it, or perhaps he'd read it the moment he'd opened his eyes. "I appreciate the professional concern. But the individuals who left me in that alley are not the kind who give up. If they come here, everyone in this building will die. Including you."

The way he said it—matter-of-factly, without bravado, the way you'd say the sun rises in the east—made it worse.

"What are you?" Cecily asked.

Bastian Czernov looked at her for a long moment. His eyes caught the fluorescent light and held it, and she realized that the gold wasn't a color so much as a luminescence, a faint internal glow like sunlight trapped in amber.

"I think you already know," he said.

She did. She'd known from the moment she'd felt his wrist—no pulse, no temperature, no explanation that fit inside the rational framework she'd built her entire life around. But knowing and admitting were different countries, and Cecily Dalton was not ready to cross that border.

"I need to run your bloodwork," she said instead.

He almost smiled. "Of course you do."

He let her.

That was the part that surprised her most, afterward. He could have left. He could have—and this thought came later, in the quiet hours, wrapped in the clinical distance she used as armor—done whatever it was that creatures like him did to make people forget. But he sat on the edge of the trauma table while Niamh called security and Remy stood guard with a crash cart he clearly intended to use as a weapon, and he let Cecily Dalton take his blood to her bench and look at it under a microscope.

What she saw there changed everything.

His red blood cells were wrong. Not damaged, not diseased—wrong in a fundamental, architectural way, as if someone had taken the blueprint for human hemoglobin and rewritten it in a language she didn't speak. The cells were larger, denser, with a crystalline structure in their membranes that scattered light in prismatic patterns. They didn't carry oxygen the way normal cells did. They carried something else—something that pulsed with a faint bioluminescence under the UV setting on her microscope.

"What the hell," she whispered.

She ran the coagulation panel. His blood clotted in patterns she'd never seen—not the normal cascade of factors and fibrin, but a rapid, almost aggressive response that explained the impossible healing she'd witnessed. The platelets weren't platelets. They were something else entirely, something that moved with apparent purpose, clustering at wound sites and generating new tissue at a rate that made her hands shake.

She was so absorbed that she didn't hear him approach until he was standing behind her, looking over her shoulder at the microscope screen.

"Beautiful, isn't it?" he said.

"It's impossible."

"And yet."

She turned to face him. He was close—closer than she'd realized, and at this distance she could see the fine details of his face: the sharp cheekbones, the faint scar along his jawline that must have been made before whatever change had given him this impossible biology, the way his eyes held that warm amber glow like a banked fire.

"You're a vampire," she said.

The word sounded absurd in the fluorescent-lit laboratory, surrounded by centrifuges and reagent bottles and the institutional hum of a hospital at night. It sounded like something a child would say. But Bastian Czernov didn't laugh.

"Yes," he said simply.

"Vampires aren't real."

"Your microscope disagrees."

She couldn't argue with that. The evidence was right there on the slide—biology that didn't fit any taxonomy she'd ever studied, blood that operated by rules she'd never been taught. Cecily Dalton had built her career on evidence, and the evidence was telling her that everything she thought she knew about the world was incomplete.

"The people who attacked you," she said. "They were—"

"My own kind, yes. I was attending a truce negotiation. It went poorly."

"A truce negotiation. Between vampires."

"We're not all of one mind, Dr. Dalton. Some of us believe in coexistence. Others believe in dominance. The ones who believe in dominance tried to kill me tonight."

"Why?"

Something dark moved behind his eyes. "Because I'm trying to save my people, and there are those who would rather watch them die than accept the terms of survival."

Before she could ask what that meant, a sound came from the corridor—footsteps, too fast, too many. Bastian's head snapped toward the door, and the transformation was instant: the almost-gentle man who had sat patiently while she drew his blood was gone, replaced by something coiled and lethal, every line of his body taut with predatory awareness.

"They've found me," he said. "Time's up."

"Wait—"

But he was already moving. He caught Niamh's gaze across the room, and the attending went still, then blinked, then shook her head as if waking from a dream. Remy did the same. Cecily watched as the tension drained from their faces, replaced by a vague, unfocused confusion.

"What did you do to them?"

"Encouraged them to forget the last hour. Standard precaution." He turned back to her, and his expression shifted—surprise again, deeper this time. "You should have forgotten too."

"I didn't."

"No." He studied her with an intensity that felt like being pinned to a specimen board. "You didn't. That's... unusual."

"Maybe I'm stubborn."

"Maybe you're something else entirely." His gaze dropped to the tubes of her own blood that sat in the rack beside his—the routine draw she'd done at the start of her shift for a research study she was running on night-shift fatigue markers. He went very still.

"Dr. Dalton," he said slowly. "I need to ask you something, and I need you to trust me enough to let me show you why."

"I don't trust you at all."

"Fair. But you're curious, and in my experience, curiosity is a stronger motivator than trust."

He was right, and she hated that he was right.

"Show me," she said.

He took one of her blood tubes and one of his own. With a precision that suggested familiarity with laboratory equipment, he drew a small amount from each and placed them side by side on a glass slide. Then, from the inside of his own wrist, he pressed a fingernail—sharp, she noticed, sharper than any human nail—into the skin and produced a single drop of something that wasn't blood. It was clear, faintly iridescent, and it smelled like copper and ozone.

"Venom," he said. "The compound our bodies produce to feed. In a healthy vampire, it's an anesthetic and anticoagulant. In the sick ones—" He let the drop fall onto the sample of his own blood.

The reaction was immediate and horrifying. The blood curdled, blackened, and began to rot on the slide, releasing a smell like spoiled meat. Cecily recoiled.

"That," Bastian said quietly, "is what's happening to my people. A wasting sickness. An old curse turned plague. It's been spreading for decades. Every vampire who tries to feed now risks this—their own venom destroying them from the inside. They're starving, Dr. Dalton. Rotting alive."

"And you?"

"I'm old enough to resist it. For now. But it's only a matter of time."

He let another drop of venom fall—this time onto the sample of her blood.

Cecily watched, expecting the same reaction. Instead, her blood did something extraordinary. It absorbed the venom, surrounded it, and neutralized it. The curdling didn't happen. The rot didn't spread. Instead, her blood seemed to metabolize the venom, breaking it down into components that—she leaned closer, hardly breathing—actually accelerated cellular repair.

"That's not possible," she said.

"And yet," he said again, and this time the words carried a weight that had nothing to do with scientific curiosity. He was looking at her the way a drowning man looks at shore.

"Your blood," Bastian Czernov said, "may be the only thing that can save us."

The footsteps in the corridor were getting closer. Cecily looked at the slide, at the impossible reaction playing out in miniature, at the man—the vampire—who was watching her with those amber eyes full of desperation he was too proud to name.

"I need to go," he said. "They can't find you. Not yet. Not until I understand what you are."

"What I am is a hematologist who just watched dead blood come back to life. I'm not going anywhere until I understand it too."

Another almost-smile. "Then I'll find you again. Tomorrow night. Come alone."

He pressed a card into her hand—heavy stock, no name, just an address in the old theater district—and then he was gone. Not walked-out-the-door gone. Simply gone, as if the shadows in the corner of the room had opened up and swallowed him.

Cecily stood in the empty trauma bay, holding a card and three tubes of impossible blood, listening to her own heartbeat hammer at one hundred and forty beats per minute, and thought: I should be terrified.

She wasn't.

She was fascinated.

Take the story with you

Read anywhere with FreeBooks

Keep reading on your phone and discover thousands more books in the FreeBooks app.

Open this book in the app