National Marine Fisheries Service agent Jackie Quiñones has a wrench thrown in her life when she uncovers a dead body on the beach, plunging her into an opioid ring investigation.

Jackie goes on a bender, threatening everything she's got going for her, throwing her sobriety out the window, and ultimately putting Krista Collins in danger like never before. Junior has to prove himself in a new way. Ray and Renee go on a date.

Jackie and Ray try to return to business as usual after a depressing failure, only to learn the case might not actually be closed.

Jackie is white-hot to prove herself as a cop and avenge the death of her best friend, Junior. Frankie teams up with his cousin while Rays off the force because of Renee. Theres a new deadly drug in town, Great White.

The whole “Great White” operation is cracked open, but a few mysteries remain. Ray’s plan to get his job back has a complicated ending. Jackie goes from feeling like a hero after an important discovery to the zero who let something critical get away.