When FBI agent Diana Reyes fell in love with Ryder Latimer, she knew that there were things she would give up. For the passion her vampire lover brought into her life, it seemed a fair trade.

Now she isn't so sure. The darkness vampires walk in wakes something inside her, something that frightens her even as it excites. Something that makes her wish for a more "normal" life.

Ryder understands her fears…and has fears of his own: of losing her, of the void that would fill him without her.

But when a case draws Diana into a purely human darkness, Ryder must make a decision: Can he let her go? Or will he step between her and death, no matter if she hates him afterward?