NMFS agent Jackie Quiñones uncovers a dead body on the beach, plunging her into the centre of a complicated and dangerous opioid ring investigation.

After discovering a lead on Sherry's murder, Jackie becomes determined to solve the case. Junior finds himself trapped, and Ray connects with his CI in ways that are unprofessional.

Jackie returns to rehab to help her investigation; Ray starts closing in on Osito at the same time he and Renee cross the line; Junior takes the first step to becoming a soldier.

Jackie finds out where Krista Collins is staying, but gets pulled back into her own life; Ray comes face to face with Osito; Junior tries to reconcile with Donna's family.

Jackie goes on a bender and puts Krista in danger; Junior seeks to prove himself; Ray and Renee go on a date.

Jackie and Junior struggle to cope in the wake of a traumatic event. Ray's investigation picks up speed. Ray is there for Renee when she really needs him.