After killing his brother, the Ice Truck Killer, at the end of last season, Dexter now finds himself unable to kill again. He certainly wants to, and in fact still needs to, but he is too unnerved by feelings he can’t quite understand. Drifting from the Code of Harry, Dexter starts making foolish choices as he tries to get back to his old self; with disastrous results. Debra returns to work at Miami Metro PD but shows signs she is not ready to resume duty after her own recent ordeal with the Ice Truck Killer. Meanwhile, Dexter’s biggest secret is about to surface for all the world to see.