Detective Morgan Carbone's life changes in an instant when she is bitten by a sociopathic serial killer. The wound heals quickly, but his bite transforms her into a terrifying werewolf. Bloodthirsty and out of control, she becomes the thing of nightmares. It is only when she is captured by another werewolf, Mario Bonaventura, that she learns to control her insatiable bloodlust. But Mario is not all he seems and he has a job for her. Thrust on a journey that takes her to the other side of the world, she must face off with Elizabeth, an ancient vampiress whose appearance mirrors that of Morgan's former lover. There is more to Elizabeth's story than Mario discloses and Morgan becomes intrigued with her. Will she succeed in her mission to kill the vampiress or find herself the willing victim of her seduction?