Last time criminal psychology expert Dr Charlotte 'Charlie' Stone helped capture a serial killer, it was nearly the last thing she ever did. Now she's determined to stick to research—but when dangerous duty calls, she can't refuse. The 'Cinderella Killer' is a charming predator who lures beautiful, single women to their deaths. FBI agent Lena Kaminsky fears her missing sister has fallen prey to the seductive psychopath, and desperately needs Charlie's unique skills before it's too late. Joined by Special Agents Tony Bartoli, Buzz Crane—and her ghostly lover, Michael Garland—Charlie heads to Vegas to track down Lena's sister. But she ends up gambling with her life.