Detective Benjamin Baldacci lost his life trying to capture a vicious serial killer and has spent the past three decades as a Protector - an angelic being that escorts the dead to their final destinations. Married to his job and unhappy with his life while alive, in death Ben hasn't found much solace or peace either so when offered the chance to return to the land of the living to rein in an evil soul once known as "The Doctor" he's more than happy to take the assignment. Detective Rachel Hartwell is hot on the trail of a killer who is using an abandoned mental hospital as their dumping ground. What she doesn't realize is that the killer she seeks isn't even human - it is The Doctor, returned to earth to destroy anyone that gets in his way. When Ben suddenly appears to Rachel to assist on the case, every aspect of the situation the detective thought she knew is transformed into a far more heinous game of cat and mouse. As the couple work together to apprehend The Doctor, they find it easier to hide the case realities from Rachel's team than to escape the attraction they feel for each other. It's only a matter of time before passion ignites a connection so strong and a love so great that not even evil or death can stand in the way.