Open with Dexter speeding through highway traffic towards the airport. He stops for gas and, finding his cards declined, goes to the trunk for cash. At the airport he buys a ticket for Budapest, despite eyeing a flight to Munich-Kiev.
He flashes back to the end of last season when Debra finds him with Travis on the slab. Dexter tell her "I snapped," blaming Rita's death. She asks about him being wrapped in plastic and he says it's just "second nature not to leave a trace." When Debra tries to call the station he stops her, pointing out how weird everything looks. He points out that even if it's ruled self-defense he'd lose his job and his son. He suggests getting rid of the body, but she doesn't go for it. Dexter then thinks they could make it look like a suicide, including setting the church on fire. The plan involves gasoline and Debra says she'll go get a few gallons. Dexter flashes back to childhood and Harry wanting to get rid of a dog that Debra likes. Dexter thinks he needs to keep Debra from the "whole truth." Dexter takes down all of his kill stuff.
Debra buys gasoline and the two of them set the church on fire.
Dexter and Debra are quickly called by the church. Dexter helps explain that this was "one final tableau." To his horror Dexter looks down and sees plastic between Travis' toes. They are able to distract Masuka in time to grab the evidence.
On her way out Maria finds one of Dexter's blood samples in a grate. She grabs it and hands it to a tech to be logged into evidence.
Dexter goes home to find Louis standing near his desk. His computer is warm, but Louis says he was just checking basketball scores while waiting for Jamie to get Harrison to bed. Dexter isn't polite about telling Louis it isn't okay that he was messing with his stuff. After Louis and Jamie leave Dexter looks at his slides, immediately noticing that he is missing one.
We see Louis on his computer at home. He complains to Jamie about how much of a jerk Dexter was being and we see that he is canceling Dexter's credit cards.
Anderson calls Debra, curious about why Travis' car wasn't at the church. She seems to give him a valid rationale for why it might have happened.
Anderson stops to help a driver stopped at the side of the road. When Anderson looks in the trunk for a wrench he spots a dead girl. The driver shoots Anderson and takes off in his car.
Debra asks Dexter how he was so prepared to kill someone in such a forensically conscious way. She noticed his clothes were different and he was wearing an apron with plastic sleeves. He has an answer for everything, but she seems bothered by the situation. Debra gets a call about Anderson. Dexter says he'll be "two minutes behind you," but goes for his getaway pack, which contains cash and passports.
Dexter arrives at the scene to find Anderson has been killed. Dexter analyzes the girl in the back of the trunk, while Debra gives him a dirty look. The dead woman's (who also owns the car) name is Kaja. Dexter finds a fingerprint on the turn signal. Debra is re-living watching Dexter kill Travis and is recalling when she was on Brian Moser's table.
At the station Debra asks for the files on the Ice Truck Killer case. She notices similarities in method to what she saw Dexter do with Travis.
Dexter finds no match to the turn signal print. Debra stops in to see him in his office and asks about the similarities to the Ice Truck Killer. Dexter knows the explanation is the Moser was imitating him, but all he says is "this is crazy" and asks her why she was in the church. He tells her it will never make any sense and doesn't mention the print he found in Kaja's car. After Debra leaves Dexter gets an Interpol match to a Ukrainian named Viktor Baskov. Dexter leaves and Debra jumps on his computer.
Dexter goes to the address listed for Viktor and finds blood, gunshot residue and evidence he he's leaving for Kiev in less than two hours.
We're back to the scene from the opening. Dexter pays for his ticket in cash, using a fake name. Dexter gets through security with his needles and finds Viktor.
Angel and Quinn go to the strip club where Kaja worked. Quinn knows the manager, a man named George. He says he has no information. The strippers aren't talking. Angel tells Quinn blood was found outside the club.
Dexter injects Viktor in the bathroom, placing him in a wheelchair and taking him to the airport's lost baggage area.
Debra tells Angel to shut down every one of the strip clubs run by George until somebody talks.
Musaka tells Debra he doesn't know much about the Anderson shooter.
At the bar Quinn and Angel toast Anderson. Angel admits he never put in for a transfer, he was just trying to help Quinn get his life together.
Viktor wakes up on the slab and says he has "very dangerous friends." Dexter kills him with a fire extinguisher.
George calls somebody named Isaac, who appears to be a wealthy Ukrainian in charge of everything. He tells him when Viktor is scheduled to arrive in Kiev and says he'll take care of the problem with Anderson.
Dexter leaves the airport with Viktor's body, wondering if perhaps nothing need change with Debra.
We see Debra on the treadmill. She thinks of something and grabs her phone. She calls Jamie and asks for Dexter. Jamie says he's at work now and tells Debra that Dexter often works until 3 or 4am.
While disposing of Viktor's body he flashes back to Debra asking why Harry took the dog away. Harry says it was because Dexter's allergic, then takes Dexter to another room. Dexter tells Harry he wouldn't have killed the dog, but Harry says he couldn't take that chance. Harry tells young Dexter he can't ever tell Debra the truth. He says Debra would be terrified if she knew what he really is. Dexter thinks his mistake was trying to save Travis instead of killing him right away.
Debra looks back at the Ice Truck Killer file and flashes back to being on the slab. Moser wanted to kill her, but Dexter stopped him.
Maria asks Masuka about the evidence from the church. He tells her nobody's has time to go through anything. Masuka tells her the only person at Miami Metro to use blood slides was Doakes, the man Dexter framed as the Bay Harbor Butcher.
Dexter comes home to find everything in shambles. Debra is sitting on a chair with his slides in front of her. "Did you kill all these people?" she asks. "I did," he says. "Are you a serial killer?" "Yes." Dexter closes his eyes as the episode ends.