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 behavior.

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. Deb throws a party to win the favor of her volleyball teammates.

Dexter needs to find a new hiding place after his most recent dumping ground is blown. Harry and LaGuerta pitch a controversial theory to Spencer, as the hunt for a missing child continues. Deb gets in trouble for an outburst in volleyball practice.

Deb sneaks away for a trip with her mysterious boyfriend. Dexter is tasked with finding her. Harry and LaGuerta travel to Tampa to look into a potential serial killer on the loose, while Miami Metro closes in on suspects in the child kidnapping.