I kept a tally. Not in a notebook—those get found. I scratched marks into the underside of my mattress with a bent nail, pressing hard enough to leave ridges in the fabric that I could read by touch.
First exchange: fingertips cold for three days. Second: one day. Third: half a day. Fourth: nothing.
That last one scared me more than the cold.
I sat on the edge of the bed, pressing my thumbnail into my index finger. Skin yielded. Pressure underneath was normal. The cold was gone. The marks under the mattress told me I should be relieved, but the pattern made no sense. Every exchange should be costing me something. That was how it worked. You gave blood, you paid the price. But my body was paying less each time. Either I was getting used to it, or the price was being collected somewhere I couldn't feel.
I didn't like either option.
Daylight in the Blood Court meant silence. The vampires slept behind locked doors, and I had the run of the palace like a mouse in a cheese factory. I'd mapped every corridor by now—the main hall with its red marble floors, the west wing where the older vampires kept their private chambers, the east wing with its library and archive rooms that smelled of dust and old paper and something faintly metallic that I couldn't identify.
The library was where I went that morning. Not the public section—the one with the comfortable chairs and the decorative shelves. The archive room behind it, where the real books lived. Iron-barred glass cases, temperature-controlled, the kind of preservation that said these books were worth more than blood.
I found it in the third case, left side, bottom shelf. A book bound in cracked leather, no title on the spine, just a symbol pressed into the cover: three intersecting circles. The parasite mark. The one I'd seen tattooed on the inside of my left wrist since I was fifteen.
I pulled it out. The leather was cool and dry under my fingers. The pages were yellow, the ink faded to rust-brown. The first page read: On the Nature of the Parasitic Blood—Its Properties, Its Origins, Its Costs.
I turned to the section on exchange effects. The text was dense, written in a style that assumed the reader already knew what a parasite was and only needed the finer details. I skimmed for anything about cold fingertips, healing speed, taste changes.
The paragraph I needed was on page forty-seven. I know because I read it four times, tracing the words with my fingertip.
The parasite's blood, once exchanged, creates a reciprocal bond with the recipient's circulatory system. The bond strengthens with each exchange, increasing the parasite's capacity for future transfers while simultaneously depleting the host reservoir. The rate of depletion varies by individual and by the volume exchanged.
The next page was torn. Not cut—ripped, roughly, the edge ragged. The text that followed picked up mid-sentence, talking about "the progressive nature of the host's physical manifestations" and "the point of no return in the symbiotic decay cycle." But the critical section—the part that would have told me what the "physical manifestations" actually were—was gone.
Someone had torn it out. Deliberately.
I put the book back. Exactly where I'd found it. I checked the glass case for signs that I'd been there—fingerprints on the iron bars, dust disturbed. Nothing. I was careful. I'd been careful since I was five.
In the corridor outside the library, I nearly bumped into one of the household vampires—a gaunt, ancient thing with sunken cheeks and the kind of silence that meant he'd learned centuries ago not to waste breath on words.
"Do you work in the library?" I asked.
He stopped. Looked at me. His eyes were the color of dried blood.
"Sometimes."
"The book on parasites—the one with the torn pages. Who tore them out?"
His expression didn't change. "The Duke's orders. Everything about parasites in that section was either removed or restricted. You're the first person I've seen pull it off the shelf."
"The Duke reads about parasites?"
"The Duke reads everything. That's why he's still alive." The old vampire turned and walked away, his footsteps making no sound on the marble.
Evening. The exchange.
Damian's** was the same as always—the endless shelves, the cold fireplace, the desk cleared except for a single candle. He was standing by the window, back to me, the collar of his shirt unbuttoned one notch more than usual. A small thing. But with Damian, small things meant something.
"Sit," he said, without turning.
I sat in the chair by the desk. The leather was cold. Everything in this room was cold.
He turned. Candlelight caught the angles of his face—the jaw, the cheekbones, the dark eyes that never seemed to fully adjust to the light. He rolled up his sleeve. The ritual was the same every time: his wrist, my knife, the cut, the press of skin against skin.
But this time, I watched him.
His breathing was different. Slower. steadier. In the first exchange, his chest had hitched when the blood hit his veins—old pain, old damage, the silver that lived in his body and burned. Now his chest rose and fell without interruption. The hitch was fading.
My blood was healing him. Whatever the cost to me, it was working for him.
"You're staring," he said.
"I'm observing. There's a difference."
"Is there?"
"Staring is what you do when you want someone to notice. Observing is what you do when you want information."
His mouth moved. Not a smile—Damian didn't smile. But the corners of his lips shifted by a fraction, and the temperature in the room felt less like cold and more like deliberate.
"Your turn," he said, holding his wrist out.
I cut. Pressed. Let the blood flow.
His eyes closed. His breathing stayed steady. The old pain was retreating, and my blood was the tide carrying it away. I felt the connection—the current between our veins, the symbiotic pull that was both intimate and clinical. His heartbeat against my wrist. Slow, steady, unhurried. A heart that had been beating for three centuries and was only now beginning to slow its march toward silence.
He opened his eyes. "You're taking less this time."
"Am I?"
"Your output is reduced by approximately a quarter. Your grip on my wrist is weaker. Your pulse is elevated." He paused. "Something has changed."
I pulled back. Pressed my thumb over the cut. "Nothing changed. I'm tired."
"Your body doesn't lie, Nessa. Even when you do."
I stood up. The chair scraped against the floor. "We're done?"
He looked at me for a long moment. Then he nodded. "We're done."
I made it three steps into the corridor before I saw her.
Isolde.
She was leaning against the wall—no, not leaning. Standing against it, the way a person stands when they've been waiting and want you to know they've been waiting. Her silver hair was pulled back, her dress was the color of old blood, and her eyes were fixed on my left wrist.
The one with Knox's bite marks. I'd forgotten to cover them.
I didn't stop walking. "Evening."
Isolde didn't move. She didn't speak. Her eyes traced the marks on my wrist—the layered teeth impressions, the pink scar tissue, the faint discoloration where two different sets of teeth had broken skin. She catalogued it all in the time it took me to pass.
She was still watching when I reached the end of the corridor. I didn't look back. I didn't need to. Her silence said everything her words hadn't.
The trouble was coming. I could smell it—the way you smell rain before it starts, the charge in the air that says something is about to break.
I went to my room. Locked the door. Drew the curtains. Sat on the bed and pressed my wrist to my nose.
Damian's scent. Faint, metallic, old. And underneath it, Knox's—musky, wild, recent.
Two different blood signatures on one wrist. Two different promises made to two different people. And Isolde had seen the proof.
I lay back. The ceiling was dark. My fingers were warm—too warm, the blood still circulating fast from the exchange, the parasitic fluid doing its work.
Sleep came faster than it should have.
And in the dream, I was standing in front of a mirror. The mirror showed me—my face, my hair, my jacket. Everything normal. Except my hands. I held them up, fingers spread, and I could see through them. Light passed through my skin, through the muscle, through the thin bones of my fingers. I could see the pattern of the mirror frame through my own flesh.
The me in the mirror was smiling. I wasn't.
I woke up. My hands were solid. Real. Flesh and blood and bone. I pressed them flat against the mattress, feeling the ridges of my tally marks through the fabric.
But the dream stayed. The image of light passing through my fingers. The smile on the reflection's face that wasn't mine.
I stared at my hands until the candle guttered out. Then I rolled over and faced the wall.
The dream was too real. And I'd learned long ago that dreams that felt real were usually warnings wearing disguises.