I knew Viktor was coming before he knocked.

The sire bond—that invisible tether I'd spent two centuries trying to ignore—pulled taut, singing with proximity. My skin prickled. The hair on the back of my neck rose. Every instinct I'd carefully cultivated screamed at me to run.

I didn't.

Instead, I straightened my lab coat, checked my reflection in the darkened window, and waited.

The knock, when it came, was perfunctory. A formality. Viktor had never needed permission to enter any space I occupied. He considered me his, in the same way he considered his tailored suits and his collection of first-edition books his.

Property.

"Come in," I said, proud that my voice didn't shake.

The door opened.

Viktor Casimir filled the doorway like an old master painting come to life—all classical lines and deliberate composition. His suit was charcoal gray, perfectly tailored. His silver-streaked hair was swept back from his aristocratic face. The scent of him rolled into the laboratory ahead of his physical presence: expensive tobacco, aged leather, stone crypts, and underneath it all, that particular musk of old blood and older power.

Five centuries condensed into one imposing frame.

"Elara." His voice was warm honey over steel. "You've been avoiding my calls."

"I've been working."

"So I've sensed." He stepped inside, and I hated how my body wanted to retreat. Hated that after two hundred years, some part of me still responded to him like a child caught misbehaving. "You've been... different lately. More vibrant. I felt it through our connection."

Of course he had.

The sire bond went both ways, though his end was stronger. He could sense my moods, my general location, my state of being. When I'd started taking the daywalker serum, when I'd started feeding from Marcus—

He'd felt it all.

"My research is progressing," I said carefully.

"Mmm." Viktor moved through my laboratory with the proprietary air of someone inspecting their investment. He trailed fingers over my equipment, examined my notes with those cold, assessing eyes. "The daywalker serum. Your little rebellion against our nature."

"It's not rebellion. It's science."

"Science." He smiled, and it didn't reach his eyes. "You always did hide behind that word. As if logic could change what you are."

What you made me.

I didn't say it. I'd learned that lesson long ago.

Viktor paused at my desk, picking up the framed photograph I kept there—the only personal item in my entire laboratory. My family. My parents and younger brother, taken the summer before the plague. Before everything ended.

"Still clinging to ghosts," he murmured. "After all this time."

"They weren't ghosts when you turned me." The words came out sharper than I intended. "They were dying. You promised—"

"I promised you immortality to find a cure. And look." He gestured at the laboratory around us. "Here you are, still searching. I kept my word, Elara. It's not my fault you were too late to save them."

The old wound throbbed.

He knew exactly where to press.

"Why are you here, Viktor?"

"Can't I visit my favorite progeny?"

"I'm your only progeny."

"Precisely." He set down the photograph, but his fingers lingered on the frame. Possessive. "Which makes you infinitely precious to me. When I felt such significant changes through our bond, naturally I became... concerned."

Concerned. Right.

The door to my laboratory opened.

Marcus walked in, and the entire temperature of the room shifted.

He stopped two steps inside, his green eyes moving from me to Viktor and back again. I saw the moment he registered the tension, the way his body language changed—shoulders back, weight balanced, ready.

War zones and humanitarian crises, I remembered. He'd documented death for years. He recognized danger when he saw it.

"Sorry," Marcus said, though his tone suggested he wasn't sorry at all. "Didn't realize you had company, Doc."

Viktor turned.

Slowly.

Deliberately.

His nostrils flared slightly as he scented the air, and I knew—god, I knew—exactly what he was smelling. Marcus's blood. Cedar and rain and that earthy, vital warmth. The blood that was currently singing in my veins, tangled with my own.

The blood I'd taken just yesterday.

"How fascinating." Viktor's voice dropped into that dangerous register I remembered from my early years. Soft. Almost gentle. Absolutely lethal. "You've acquired a pet."

"He's not a pet." I moved before I could think better of it, positioning myself slightly between them. "This is Marcus Reid. He's a volunteer in my clinical trial."

"A volunteer." Viktor's smile sharpened. "How... altruistic."

Marcus met Viktor's gaze without flinching. I had to give him credit for that. Most humans couldn't hold eye contact with a vampire of Viktor's age for more than a few seconds. The weight of all those centuries pressed down like a physical force.

"Someone's got to be the lab rat," Marcus said. "Might as well be me."

"Indeed." Viktor circled closer, and every muscle in my body tensed. "And what exactly does this trial entail, Mr. Reid?"

"Blood donation. Medical monitoring. The usual."

"The usual." Viktor's eyes flicked to me, amber brightening to gold. "How clinical. Tell me, Elara—does your volunteer know what he's volunteering for? The full scope of your... research?"

My throat tightened.

"He knows enough."

"Does he?" Viktor stopped directly in front of Marcus, studying him like a specimen. "Does he know that you're using him? That humans are nothing but resources to our kind? That whatever attachment you might be developing is simply the bond between predator and preferred prey?"

"That's enough." My voice came out harder than I intended.

Marcus's jaw tightened, but he didn't back down. "I'm aware of what Dr. Thorne is. I'm aware of what I am. We're both adults making informed choices."

"Informed." Viktor laughed, and the sound raised goosebumps on my arms. "How delightfully naive. Tell me, Mr. Reid—has she told you how she became what she is? Has she explained that she volunteered for this existence? That she begged me to turn her?"

Ice flooded my veins.

"Viktor—"

"No?" He turned to me, eyebrows raised in mock surprise. "You haven't shared that particular detail? How you came to my door during the plague of 1823, desperate and wild, offering anything—everything—for the power to save your dying family?"

Marcus's eyes found mine. I saw the question there.

The betrayal of omission.

"I was twenty-eight," I heard myself say. My voice sounded distant, hollow. "The plague had already taken half the city. My father was dead. My mother and brother were dying. I'd studied medicine, but there was no cure. Nothing that worked. I was watching them waste away, and I was completely helpless."

Viktor smiled. He always did love this story.

"There were rumors," I continued. "About a wealthy benefactor who'd survived every plague, every epidemic. Who never aged. Who could do impossible things. I tracked those rumors to Viktor's door."

"And she was magnificent," Viktor interjected. "Brilliant and desperate and so beautifully broken. She offered herself to me in exchange for the power to cure disease. To save humanity." His smile turned cruel. "I accepted."

"But you were too late," Marcus said quietly. Not a question.

"By three days." The old grief sat in my chest like a stone. "The transformation took three days. When I woke up—when I finally had the strength and speed and senses that could have helped me understand the disease—they were already dead. Buried."

The laboratory was silent except for the hum of equipment.

"So you see, Mr. Reid," Viktor said, "Elara has always had a savior complex. Always trying to redeem herself for failures that were never her fault. It's almost endearing." He turned back to me. "Though I must say, this particular project concerns me."

"Why?" I forced myself to meet his gaze. "Because I'm trying to walk in daylight?"

"Because you're trying to be human again." His voice hardened. "And that, my dear, is impossible. You can coat yourself in science and surround yourself with mortal pets, but it doesn't change what you are. What we are."

"Apex predators," I said bitterly. "I know. You've told me often enough."

"Because you keep forgetting." Viktor moved closer, and I smelled stone crypts and dried roses. "We are not meant to hide in shadows out of shame, Elara. We are not meant to deny our nature. This serum of yours—this daywalker research—it's a rejection of everything I gave you."

"You gave me immortality I never wanted."

"You begged for it."

"I begged for the power to save them!" The words exploded out of me. "Not for this. Not for centuries of watching everyone I care about die while I stay frozen. Not for the hunger, the isolation, the constant battle against instincts I despise. You promised me I could help people, Viktor. Instead, you made me a monster who feeds on them."

Silence.

Viktor's expression shifted—something dangerous moving beneath the surface.

"Careful, Elara."

I'd gone too far. I knew it. But I was so tired of pretending.

Marcus cleared his throat. "I should go."

"No." Viktor's voice cracked like a whip. "Stay, Mr. Reid. You should hear this. You should understand exactly what you're involving yourself with."

"Viktor—"

"In two weeks, the Conclave gathers." Viktor's attention shifted back to me, and I felt the full weight of his authority. "You will attend. You will present your daywalker serum to the council. They're very interested in your progress."

My blood went cold.

"No."

"It's not a request." His voice dropped into that soft, dangerous register again. "You've been working on this project for decades, using resources the Conclave provided. They want to see results. They want to understand the implications."

"The implications are that vampires could walk in daylight. That's all."

"Is it?" Viktor's eyes gleamed. "Or are there other... side effects? Other benefits you've discovered?"

He knew.

Somehow, he knew about Marcus's tumor markers. About the healing.

"I don't know what you mean."

"Don't you?" Viktor smiled. "I can smell him on you, Elara. Not just his blood—though that's obvious enough. But something deeper. You've been feeding from him regularly. Exclusively, if I'm not mistaken. And you've changed because of it."

My hands clenched into fists.

"The Conclave wants answers," Viktor continued. "They want to know if your serum is truly just about daywalking, or if you've stumbled onto something far more significant. Something that could change everything for our kind."

"I'm not presenting anything until I understand it myself."

"Then you have two weeks to understand it." Viktor buttoned his suit jacket, the gesture final. "I'll send you the details. The Conclave meets in Prague. Don't disappoint me, Elara. You know how I hate disappointment."

He moved toward the door, then paused.

"Oh, and Mr. Reid?" Viktor glanced back at Marcus. "Do enjoy your time with Dr. Thorne. I'm sure it's... enlightening. But do remember—she's had two hundred years to perfect the art of emotional detachment. Whatever you think is developing between you, it's temporary. Everything with mortals is."

Then he was gone.

The door clicked shut behind him, and I realized I was shaking.

"Elara—"

"Don't." I held up a hand. "Just... don't."

But Marcus didn't leave. Instead, he crossed the laboratory and stood close enough that I could feel his warmth, smell cedar and rain and that vital, living heat that called to every predatory instinct I possessed.

"He's wrong," Marcus said quietly.

"About which part?"

"All of it." His hand found mine, fingers threading through my trembling ones. "You're not a monster. You're not emotionally detached. And whatever's happening between us isn't temporary just because I'm mortal."

I looked up at him, and god help me, I wanted to believe him.

"You don't understand what he is to me," I said. "The sire bond—it's not just emotional. It's physical. Metaphysical. He can feel me, Marcus. My moods, my location, my state of being. And I can feel him. It's like having someone inside your head all the time, someone who knows exactly which buttons to push."

"Sounds like abuse."

The word hit me like a slap.

"It's not—" I started, then stopped. Was it? "It's complicated."

"It's really not." Marcus's thumb traced circles on the back of my hand. "He controls you. He shows up uninvited, makes demands, tears you down, and then frames it as concern. That's not complicated, Doc. That's textbook manipulation."

I wanted to argue. Wanted to explain that Viktor had given me immortality, had taught me to survive, had been there for two centuries when everyone else died.

But the words wouldn't come.

Because Marcus was right.

"The plague," Marcus said after a moment. "Your family. That's why you do this. The research."

"I told you. I want to help people."

"No." His free hand came up, fingertips brushing my jaw with devastating gentleness. "You want to save them. Because you couldn't save your family. Because you've spent two hundred years trying to redeem yourself for a failure that was never your fault."

My throat tightened.

"Viktor said—"

"Viktor's a manipulative bastard who's been gaslighting you for two centuries." Marcus's voice was fierce. "You were twenty-eight years old, watching your family die from a disease you couldn't cure. You made a desperate choice. That doesn't make you broken, Elara. It makes you human."

"I'm not human anymore."

"Aren't you?" His thumb traced my cheekbone, and I shivered. "You still feel. You still care. You still fight to save people, even knowing most of them will die anyway. That's more human than half the living people I've met."

I wanted to kiss him.

The urge was so sudden, so overwhelming, that I actually swayed forward before catching myself. His pulse jumped—he felt it too. The shift in the air between us. The magnetic pull.

"Marcus—"

"I know." His voice had gone rough. "Trust me, I know. But for the record? Whatever Viktor thinks, whatever he's told you about yourself—you're not what he says you are. You're not his property. And you sure as hell aren't a monster."

My phone buzzed.

I pulled away reluctantly, checking the screen. A message from Viktor, sent to my email. The Conclave details, just as he'd promised.

Two weeks.

Prague.

A presentation to the vampire council about research I barely understood myself.

Research that was healing Marcus but draining me. Research that created a bond between us I couldn't explain. Research that Viktor clearly saw as either a threat or an opportunity—I wasn't sure which was worse.

"What are you going to do?" Marcus asked.

I looked at him—this dying man who was getting better, this temporary human who was becoming permanent in ways I couldn't afford, this volunteer who'd somehow become the center of everything.

"I'm going to figure out what I've created," I said. "Before Viktor and the Conclave decide for me."

"Need help?"

"You're already helping. More than you know."

"I meant with the other thing." Marcus's expression turned serious. "The Conclave. Viktor. All of it. You don't have to face them alone, Doc."

"You can't come to Prague."

"I wasn't offering to come to Prague. I was offering to be here when you get back." He squeezed my hand. "Someone should be."

The words settled into my chest, warm and terrifying.

Someone should be.

When had I last had someone waiting for me? Someone who cared whether I came back?

Two hundred years, give or take.

"I should go," Marcus said, though he didn't move. "Let you work. But Elara?"

"Yes?"

"Whatever you figure out about your research—about what's happening between us—don't let Viktor tell you what it means. Don't let him take this from you."

He left before I could respond.

I stood in my laboratory, surrounded by equipment and data and two centuries of carefully constructed isolation, and felt the walls beginning to crack.

Viktor wanted me in Prague in two weeks.

The Conclave wanted answers.

And I had a dying man's blood in my veins, his memories in my mind, and the terrible, wonderful suspicion that I was falling for him.

That I'd been falling since the moment he'd made that stupid joke about being a juice box.

That I was already so far gone that losing him would destroy me.

I looked at the photograph on my desk. My family, frozen in that last perfect summer.

I'd failed them.

I wouldn't fail Marcus.

Even if saving him meant facing Viktor, the Conclave, and every truth I'd spent two centuries avoiding.

Even if it meant admitting that the monster playing at humanity had somehow, impossibly, found something worth being human for.

I pulled up my research files and got to work.

Two weeks to understand the impossible.

Two weeks to find answers.

Two weeks before Viktor took everything I'd built and twisted it into something I couldn't control.

The sire bond hummed in the back of my mind—Viktor's presence, distant but constant. Watching. Waiting.

Let him watch.

I had work to do.

And for the first time in two hundred years, I had something worth fighting for.

Someone worth fighting for.

Even if he was mortal, temporary, and absolutely terrified of what came next.

Even if I was all those things too.