While LaGuerta focuses the department's attention on a potential suspect in the Ice Truck Killer case, Debra continues to look elsewhere. Doakes pays a visit to drug lord, Carlos Guerrero. Flashbacks show Dexter killing his first human.
Dexter attends the funeral of a slain cop, Ricky Simmons. As he looks around at the other people, he thinks to himself, “Most people have a hard time dealing with death, but I’m not most people. It’s the grief that makes me uncomfortable. Not because I’m a killer. Really, I just don’t understand all that emotion…which makes it tough to fake. In those cases, shades come in handy.”
After the dead body of another of victim of the so-called "Ice Truck Killer" is found on the ice rink at Miami's Hockey Dome, Dexter helps out Debra, newly transferred to the homicide squad to investigate when Lt. LaGuerta, ambitious for a promotion and the media spotlight, decides to have the department pursue a security guard whom they believe is the Ice Truck Killer.
Meanwhile, Rita receives an unpleasant visit from her imprisoned ex-husband's drug dealer who confiscates her car, leading Dexter to drive her to and from her hotel receptionist job.
Dexter zeros in on his next victim, a recently paroled teenage murderer who harbors some dark secrets of his own. Dexter also flashes back to committing his first killing--a nurse who was poisoning his sick, adoptive father. It was messier than he anticipated. .
Elsewhere, Sgt. Doakes continues to hound the drug kingpin, Carlos Guerrero, but gets in over his head when some dirty cops decide to take matters involving Guerrero into their own hands.
- Amanda Wyss played Tina Gray in A NIghtmare on Elm Street. She appears briefly in this episode as a Social Worker.
- Denise Crosby played another wicked Mary in The Walking Dead.