Lucas is hunting, not only for a serial killer, but for his mate as well. With the arrival of his new partner Toby, he may be able to solve both problems at once.

There is a murderer rampaging through San Francisco, killing on every full moon while under the delusion he is a werewolf. Little does this ruthless man know that the police officer tasked with catching him is a true werewolf.

Lucas Donald has one of the best solve rates in the state. He's not happy that he's been saddled with a new partner on such an important case. That is until he meets Toby Devin, who is possibly the most beautiful man he's ever seen. Together they have to crack the case. Can they find happiness despite family and job stresses?