Young Dexter Morgan struggles to keep his urges in check while navigating life with his father, Harry, and sister, high-school senior Deb.

Dexter adjusts to his new job as a forensics intern at Miami Metro, as Harry returns to work after his medical leave. Deb lashes out at her dad by engaging in petty criminal behaviour.

Dexter goes after a loan shark with ties to Batista, as Harry is told to keep an eye on Maria LaGuerta, Miami Metro's newest homicide detective.