Rita threatens to leave Dexter if he does not commit to a program to deal with his drug addiction. He starts attending Narcotics Anonymous meetings, while still trying to evade Doakes' constant surveillance. At the meeting, Dexter meets a mysterious and flirtatious woman named Lila, who volunteers to be his sponsor. Later, he hunts down a new victim, Roger Hicks, a used-car salesman who murders beautiful brunettes. Lundy invites Debra to join the new task force investigating the Bay Harbor Butcher, and soon discovers a pattern to the murders.