Jane is a young girl studying to be a doctor in Chicago. She has no idea about that hidden, other world where werewolves and vampires are engaged in a desperate, never-ending battle — until their paths cross one fateful night and the girl loses her nearest and dearest. But why have the lycanthropes and the undead taken an interest in her? Why do they need her so much? Is she to be sacrificed on a bloody altar? Or is there a different fate for her, a fate that, despite the night surrounding her, promises light and salvation?