A frantic husband arrives at homicide looking for his missing wife when the body of a strangled woman is discovered. He identifies the dead woman as their lover and introduces the homicide detectives to the world of swinging. Rhys and a reluctant Allie go undercover to find a killer and catch a sociopath. Journalist Juliette continues looking into her confidential source's allegations of corruption against Nick and his old sergeant in the Dane Majors case. Juliette and Nick's relationship gets complicated. Nick denies planting evidence, but Juliette isn't convinced. Nick takes another look at key players and the evidence that led to Majors' conviction.