Katherine Wells is Cleveland's top homicide detective and she's hot on the trail of the Antoinette killer. The string of burnt and beheaded bodies have little in common, except they keep turning up. In search of clues, she encounters Alexander. His intoxicating old world persona captivates her and she suddenly finds herself in a torrid love affair. The passion is overwhelming and her sense of law falls into blissful chaos.
As an elder vampire, Alexander struggles for anonymity in the modern world. Killing isn't personal; it's to prevent them from becoming the undead. His kind can't be discovered. With Katherine's investigation getting too close to the truth, the other vampires demand he eliminate Detective Wells.
Katherine discovers Alexander's supernatural secret and he learns Katherine's the detective he must silence. The revelations are shocking. He's everything she ever wanted and everything she stood against. Torn between a love like no other and the law she's sworn to uphold, she must choose. Against time, the police and the other vampires, they must destroy the evidence she's collected and join the undead.