Tess Thorne, a famous and revered thriller writer, faces a long drive home following a book signing engagement. Prompted to take a shortcut at the suggestion of the event’s planner, Tess sets out to return to her house. But while driving on a lonely stretch of New England road, her tire blows out, leaving her stranded.Relieved when another driver stops and offers assistance, Tess quickly discovers that her savior is actually her assailant, a serial killer who repeatedly assaults her. Left for dead in a drainage pipe to rot with the bodies of his other victims, Tess just barely escapes and makes her way safely home. But with her fragile mind beginning to unravel, she begins a plot for vengeance that will bring her face-to-face with another stranger: the one inside herself.