Mateo Cruz has a problem: he has been unable to shift into his werewolf form for three months, and his wolf has taken up residence in his head, taunting him night and day with vividly violent and carnal thoughts, Evie Savoie is the witch who, against her better judgment, is willing to help him--but Mateo's wolf has a mind of his own, and now it wants only one thing, Evie.