Medical research scientist Elena Arcos has always lived her life under the radar. When she is shot in a convenience store robbery, she finds herself rocketed into supernatural insanity courtesy of a sexy immortal law enforcer. He's convinced she's some kind of freaky half-vampire thing and that her deceased dad was the real deal: a blood sucking monster. Yeah, right.

As a Slayer, an elite law enforcer descended from Azrael himself, Nikolai Itzov's orders from the Underveil General are clear: Kill Elena Arcos or die. The only thing holding him back from that directive is the overwhelming urge to protect her. Too bad she's also the offspring of his father's murderer. Kissing Elena, let alone being with her body and soul, can never happen.

Nikolai and Elena find themselves in a life and death battle to stop a plot designed to lift the Underveil and enslave humans. With her analytical mind and his centuries of training, they might be able to foil the plot with their lives, and maybe even with their hearts intact. But in order to succeed, he must help her become the very thing he hates the most: an Undead.