Danger swirls around the squad as they investigate a suspect for rape and try to protect their key witness; a new chief of detectives puts Benson to the test; an off-duty Fin tries to stop an assault in progress.
The squad investigates an assault at a house party where no one can identify the assailant. When two suspects are detained for questioning, Rollins takes the chance to turn one against the other.
A detective investigates inconsistencies when a man reports his girlfriend's kidnapping, while Tynan confronts Benson and Griffin faces scrutiny over his police work.