Catherine “Cat” Chandler is a smart, no-nonsense homicide detective, who is haunted by her own tragic past. When she was a teenager, Cat witnessed the murder of her mother at the hands of two gunmen. Cat would have been killed too, but someone – or something – saved her. While investigating a new case Cat and Tess discover fingerprints that lead to a handsome doctor named Vincent Keller, who was reportedly killed by enemy fire while serving in Afghanistan in 2002. Digging deeper, Cat learns that Vincent is actually still alive. For mysterious reasons that have forced him to live outside of traditional society, Vincent has been in hiding for the past 10 years. With the help of his childhood friend J.T. Forbes, Vincent has been able to guard his terrible secret – when he is enraged, he becomes a terrifying beast, unable to control his super-strength and heightened senses. As she slowly comes to terms with Vincent’s monstrous alter-ego, Cat senses she can trust him in ways she hasn’t been able to trust any man before and, despite the obstacles between them, she realizes that she’s safer with him than anywhere else.