Astor and a friend arrive at the family home having run away. They then leave the house when Lumen is out and Dexter thinks they have been kidnapped. It turns out they are running away from Barry, Olivia's mum's boyfriend who has been beating her. Meanwhile Dexter gets a little too close to Jordan Chase and tips his hand by stealing a blood sample from him. Deb finds out why Quinn was suspended. She also begins work in the filing room and discovers evidence of Boyd Fowler's accomplices.
Dexter tells Deb that he fought Travis off and killed him in self defence. They burn the church down but she soon realises that he was lying. She looks into the Ice Truck killer files and begins to piece the truth together. Mike tries to help someone with a burst tyre and gets shot. The killer Victor escapes but Dexter is soon on his case. LaGuerta spots a blood slide at the church and begins to look into it.
Dexter hasn't been in touch with Deb for months. She is off working on minor cases undercover and enjoying the escape. A body is found with a piece of the brain missing and a psychologist Dr. Evelyn Vogel offers Miami Metro her help. She seems particularly interested in Dexter.
Deb is arrested on a DUI and calls Quinn for help. He tells Dexter who tries to convince Deb that she has done a huge amount of good. Deb can't be shaken though and gets drunk again before marching into Miami Metro to confess to killing LaGuerta. Meanwhile Vogel gets more gifts from the killer who now knows that Dexter is involved.
Deb is reinstated and goes hard after the barrel-girl killers. She finds DVDs of the abuse in Cole Harmon's house. She also investigates Alex Tilden the last of Jordan Chase's accomplices. Lumen says she wants to kill him and so Dexter arranges everything for her. Once she does it she sleeps with Dexter. Meanwhile Liddy has bugged the apartment.