Dr. Vogel tells Dexter that Deb was traumatized when she tried to kill him. Now that she's hit rock bottom, things will improve. Dexter isn't too happy with either Vogel or Deb and concentrates on finding serial killer A.J. Yates. Deb and Dexter have another problem when Yates kidnaps Vogel and they set out to rescue her. At the station, the police continue investigating the death of Norma Rivera. She had sex not long before dying and they assume that whoever that was is also the man who killed her. They have a suspect, her former employer Ed Hamilton, who admits to having had sex with her but insists she was alive when he last saw her. Dexter wonders if Hamilton's son Zach might have been involved. Vince Masuka meanwhile has confirmed that Nikki is his daughter and is quite taken by the idea of fatherhood. Quinn warns him to be careful about relatives who appear out of nowhere.
Dexter and Debra go on therapy together with Dr. Vogel. Dexter is hurt and does not want to talk to Debra. Meanwhile there is a dispute between Quinn and Miller for the sergeant position. When a young woman is murdered and the prime suspect is Ed Hamilton, Matthews tells that the influent Hamilton family is friend of the Miami Metro and presses Quinn to be careful in his investigation. When Quinn and Miller find a witness that puts Zach in the crime scene, they inform the station and the witness is bribed and does not confirm in the police station. Dexter suspects of Hamilton's son Zach. Masuka asks Debra to check Niki. Meanwhile Yates kidnaps Dr. Vogel and Debra teams up with Dexter to seek her out. Dexter and Debra locate where Yates and Dr. Vogel are. Will they arrive in time to save her?
Dr. Vogel encounters the Brain Surgeon and Masuka discovers a shocking secret from his past.
- Dexter and Debra talk to Vogel about the "accident." Debra points out that she ultimately saved her brother from the sinking car, while Dexter is understandably upset she tried to kill them both. Vogel says Debra is struggling with what she's learned about Harry's suicide. Vogel thinks this was rock bottom and Debra's first step towards recovery. Dexter leaves to find Yates, saying "to Hell with both of you."
Dexter seems irritated by his family, even ignoring Debra's calls. Jamie wants to have Cassie over for dinner in an attempt to set her up with Dexter.
Before the next briefing Masuka tells everybody he has confirmed that Nikki is his daughter. Quinn warns him there must be some reason she's shown up in his life. Quinn runs the briefing in Angel's absence, reporting that Janet, the Brain Surgeon's stabbing victim, has survived. They've learned Norma had sex before her death and it was probably consensual. Her ex-boyfriend was out of town, but it's possible she was having an affair with her boss, Ed Hamilton. Angel shows up and says they have an address for Yates.
Matthews takes Quinn aside and tells him the Hamiltons are "good friends" of Miami Metro, and warns him to be very careful in the investigation.
Quinn and Dexter arrive with a warrant to collect DNA from Hamilton. Before the collection he admits to the affair with Norma. His wife found out and insisted she be fired. They had "break-up" sex earlier that day but Hamilton says she left alive. He has security camera proof. On his way out Dexter runs into Hamilton's son, who assures him his father is not a killer.
Yates breaks into Vogel's home while she has tea and attacks her.
Debra calls Vogel to say she's needs to talk and is coming by. She finds evidence of the break-in but Vogel is nowhere to be found.
At Yates' home the police discover he was burying bodies in the backyard. All of the victims were kept alive and tortured for weeks. He would break their toes before ultimately stabbing them. Debra shows up at the crime scene to tell Dexter about Vogel. She wants to help him find Yates. He asks why she didn't let him drown and she says she couldn't imagine her life without him in it. They thinks Yates has probably taken Vogel to a home he's worked in recently.
Elsewhere Yates angrily asks Vogel about Dexter as a desperate Vogel tries unsuccessfully to reason with him.
A vendor tells Quinn and Miller he spotted Hamilton's son Zach at Norma's place near the time of her death.
Nikki tells Masuka she sought him out because her mother recently died and she moved to Miami for school. She has been feeling alone. She asks questions about his financial situations and has Masuka pay for her lunch.
Dexter realizes it would take days to find which house Yates is hold up in with Vogel. He talks to Angel who tells him Yates has used the same ATM twice in the past few days.
Quinn tells Matthews about Zach and says the vendor has suddenly changed his story. Quinn thinks he was paid off by Hamilton but Matthews tells him not to bring Zach in for questioning.
Debra has Elway help find where Yates might be located. Masuka drops by and asks Debra to privately investigate Nikki.
Dexter comes home and finds Jamie, Quinn and Cassie preparing for dinner. He'd forgotten about the set-up and tells Jamie he needs to bail to get some work done. Jamie tells Dexter if he leaves, she'll leave and he'll have nobody to watch Harrison. Debra calls Dexter and they realize there about 20 potential homes Yates could be using. Dexter takes Cassie aside and tells him he needs to leave for work. She's cool with it and they agree to reschedule as Cassie adroitly begs out of the rest of the evening.
Yates prepares to break one of Vogel's toes. She then pretends to be his mother, yelling at him and slapping him. Yates leaves to clean himself up and Vogel calls Dexter from and leaves the 'phone connection open so that he can eavesdrop. Debra has Elway trace the number. While Dexter and Debra race to the location Yates discovers the phone.
Dexter and Debra arrive and find Vogel tied up upstairs. They ask where Yates is and Dexter spots some blood on the floor. Dexter sees he's hiding under the bed and pretends not to see him as Debra moves Vogel to safety. Dexter then takes a massive curtain rod and impales Yates through the bed.
After the rescue Vogel thanks them both for saving her. The three talk about the matter and Debra appears to have come to some sort of acceptance of the situation.
Dexter, Debra and Vogel dump Yates' body in the ocean. Vogel asks why he wanted them to come. He says "I wanted to be with family."