When an unidentified woman is strangled and dumped, Homicide is drawn into the Swingers scene. Rhys and a reluctant Allie go undercover at a seedy sex party and Nick's fling with reporter Juliette takes a dark turn. A man comes in to Homicide to I.D. the body of his missing wife, but when the deceased is revealed to him, he informs Homicide they've made a mistake. The body on the slab is not his wife's - the dead woman before them is his and his wife's lover. As reporter Juliette Gardiner delves into Dane Majors' case, the mysterious Deep Throat gives her information suggesting serious police misconduct. Nick confides in Jennifer - his reputation is on the line. How far-reaching will Deep Throat's revelations be?