It has been thirteen years since she was brutally attacked by her husband in a fit of rage. Now, with her ex-husband's release form prison looming, will veteran homicide detective Christina Regan be able to put the past behind her as she leaves her hometown of Memphis for a fresh start in Boston? With the help of her mentor, Christina lands a position with Boston Homicide and must hit the ground running when her arrival coincides with that of an elusive serial killer. Will Christina's experience both as a seasoned detective and a determined survivor be enough to help Boston Homicide Detective Rachele Russo as she and the rest of the Boston Police Department work to write the right ending to an unfinished story?