State cop Jackie Quiñones is back to her wild partying ways, Ray Abruzzi is top cop after taking down the New York connection, and imprisoned Frankie Cuevas secures a new partner on the outside.
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.