Skeptical psychologist Kristin Marlowe goes to the house of her cheating lover, Hal, to retrieve an irreplaceable object he's stolen. Instead she makes an unexpected discovery in the shed behind the house. Kristin has to suspend her disbelief and fight for her life against a horde of deadly creatures that prey upon vampires and humans alike. Kristin's allies know as little as she does how to fight these creatures. Her fragile client, Mina, her vampire-romance-writing landlady, Violet and Bram Van Helsing an expert on vampire cults who has never met a real live vampire join her in seeking help from Sir John Falstaff, veteran vampire, con man and unrepentant scoundrel, a man who never lets being undead get in the way of having a good time.