Six months following LaGuerta's death, a mentally-shattered Debra has quit her job at Miami Metro due to her guilt of murdering her. In her absence, Batista returns from retirement and is promoted to the vacant lieutenant position. Miami Metro investigates a new serial killer, the "Brain Surgeon", and receives the unexpected help of psychopath expert Evelyn Vogel (Charlotte Rampling), who appears to have a special interest in Dexter. Meanwhile, Debra is working an undercover job for a private investigation company to bring in a bail jumper (Rhys Coiro), who had stolen $500,000 worth of jewelry from a mob-controlled store. Dexter goes to warn Debra that the person her mark is due to sell to is a hitman from the mob, but Dexter goes into a rage after talking to her and kills the mark, while the hitman secretly watches Debra leave. Quinn and Jamie have begun a relationship, which Quinn wants to keep a secret from Batista. Later, Dexter is confronted by Vogel with murderous drawings from his childhood. When Dexter threatens her, she states he can't kill her since she doesn't meet Harry's Code.