Shane has a new partner. Frankie has intel for Alan on Jorge's cuddle. Ray and Renee's relationship hits rock bottom and Jackie completes rehab - no more rogue hero bullshit.
Jackie Quinones, a hard-partying lesbian National Marine Fisheries Service agent, has her free-wheeling life thrown into disarray when she discovers a body on the beach - another casualty of Cape Cod's opioid epidemic. As a result of this trauma, Jackie takes the first steps toward becoming sober - until she becomes convinced that it's up to her to solve the cuddle.