Dexter discovers the man who killed his mother, before his young eyes, is still alive. When he shares this information with Lila, she suggests he face the man, as part of his “steps” to addiction recovery. And as his sponsor she insists on tagging along. But when Dexter finds his mother’s murderer, his killer urges push him back to the knife’s edge.
While pretending to be a drug addict, Dexter gets an N.A. sponsor to please Rita. But when the sponsor turns out to be a beautiful woman who may have more in common with Dexter, Rita is not happy. Things get worse for Rita when her estranged mother comes for a visit. Meanwhile, Dexter must find a way to lead the all-too-smart FBI Agent Lundy, now working with Miami Metro PD, off his trail.
Dexter stalks his latest victim: a murderer so vile he could only be a used-car salesman. Dexter finds the man’s smooth-talking charm and effortless lying are things that he himself is lacking these days. In fact, Dexter’s inability to lie to Rita about his midnight activities has caused her to think that he’s a drug addict, and if he doesn’t commit to a 12-step program to deal with his addiction, she threatens to leave him.
Dexter, still trying to recover his killer instincts, continues his pursuit of the mountain-sized gangster, Little Chino. Debra convinces herself she is past the trauma of her ordeal with the Ice Truck Killer, but loses control on the job. As they both struggle with their recent pasts, Agent Lundy, a high-profile FBI agent, comes to Miami Metro PD to break the case of the city’s newly discovered serial killer, the Bay Harbor Butcher.
