Chapter 5: The Promise

"My sister," she said. "Before we discuss anything about my blood, I want to know about my sister. Can you help me find her?"

Casimir regarded her for a long moment. His expression was perfectly neutral, a blank slate, but she had the sense that a very large and complicated calculation was happening behind those dark eyes.

"I can," he said finally. "My network extends into circles that the police do not frequent. If your sister is in Prague, if she is alive, I can find her. If she is not alive, I can still tell you where she is."

The weight of that statement settled over the room like dust. If she is not alive. Nora forced herself to continue breathing, to keep her hands still.

"Then we have an arrangement," she said.

"We do," Casimir agreed. "Though you haven't asked the questions you should ask."

"Like what?" Nora said, though she suspected she knew.

"Like whether I might use this arrangement as an excuse to keep you bound to me indefinitely. Like whether my feeding from you might alter your mind, soften your resistance, make you more pliable. Like whether you are safe in a sealed room underground with a being whose control is theoretical at best after such a long sleep." He tilted his head slightly, examining her. "Like whether you can trust me."

Nora met his gaze and found no cruelty in it, only a kind of weary precision, as if he were laying out the facts of the matter with the same detachment she was using to receive them.

"How do I know I can trust you?" she asked, because he seemed to expect the question, and because it was reasonable to ask.

"You don't," he said. "But consider the constraints: you are archivist bloodline, which means that no compulsion I've ever developed will work on you. I cannot make you do anything. I cannot make you forget, cannot make you docile, cannot make you mine in the way that would give me control over your actions. You are protected by the very blood that makes you valuable to me. And I have slept for one hundred and seven years because becoming something that took what it wanted was a future I could not accept. I chose imprisonment over that path once. I am unlikely to choose differently now." He leaned forward slightly. "We are, Miss Blake, evenly matched. That is the only reason I would agree to an arrangement such as this."

Nora found herself nodding, assimilating this as fact. Archivist bloodline. Immune to compulsion. Protected by the very thing that made her useful. It was a strange kind of power, negative power, the absence of a constraint. But it was power nonetheless.

"I need to see your sister located," Casimir continued. "And you need access to resources and knowledge that only I possess. We are pragmatists, both of us, yes? You read that the moment you entered this archive. We will conduct this arrangement with clarity. I feed from you twice weekly, perhaps three times if the recovery needs are urgent. You accompany me into the circles where information lives. We find your sister. And when that is accomplished, we part ways, unless we find reason not to."

Nora considered this. It was a reasonable arrangement. Insane, impossible, and thoroughly outside any framework she'd constructed for how the world worked, but reasonable.

"Agreed," she said.

Casimir nodded, and then he stood, moving toward the shelves with that same precise, controlled movement. He ran his fingertips along the spines of books, and Nora realized he was reading them by touch, that a century had not dulled his ability to know what text he held.

"When?" she asked.

"Soon," he said, without turning. "But not tonight. Tonight you will go back to your hotel, you will sleep, you will process what you've learned in the way that archivists process: carefully, methodically, cataloguing each piece until the structure is clear. Tomorrow evening, you will come to me. I will explain the particulars of what we're doing. And then we will begin." He turned to face her again. "Unless you have changed your mind?"

Nora did not change her mind. Instead, she stood, and she extended her wrist across the table, palm up, as if she were offering him a book that he'd requested.

"I want to know how it feels," she said quietly. "Before I agree to let it happen regularly. I want to know what I'm signing myself up for."

Surprise moved across his face, or recognition. He remained perfectly still for a very long moment, looking at her wrist as if it were a text written in a language he hadn't heard spoken in centuries.

"No," he said finally, and his voice was very quiet. "Not tonight. Not here. Not in a place like this." He reached out, and his hand stopped just short of touching her, suspended in the air between them. "When we do this, Miss Blake, it will be somewhere where you have chosen to be. Somewhere where you understand the terms. Somewhere where you can decide that the cost is worth paying." He lowered his hand. "That is not somewhere dark and sealed, and it is not tonight."

Nora withdrew her wrist slowly, and though she didn't quite understand the refusal, she understood that it was given as a form of respect. Constraint. Control.

"Tomorrow then," she said.

"Tomorrow," he agreed. "And Nora. That is your name, yes? Nora. Remember that you have bound yourself to something that has not fed in more than a century. Remember that I did not say yes to your offer immediately. Remember that you are protected not by my goodness but by the architecture of your bloodline. These things matter."

"I'll remember," Nora said, and she found that she meant it with the kind of clarity that suggests a decision has been made at a level deeper than words could reach.

She left him there in the archive's deep places, among the sealed books and the dark, and climbed the narrow stone stairs with her heart beating in a pattern she didn't recognize. And though she didn't turn around to verify it, she felt his gaze on her all the way up, following her progress through the layers of the building, watching her until she emerged into the Prague evening and the amber streetlights and the world that had somehow continued on despite the fact that something fundamental about it had shifted.