As he prepares to testify against pimp Bart Ganzel, a woman comes forward claiming that Brian Cassidy raped her while he was an undercover detective. ADA Barba, Detective Benson and the SVU squad nervously await the outcome of the trial, concerned for Cassidy as well as the ongoing prosecution of Ganzel. When prosecutor Derek Strauss pushes hard for a win, Cassidy and his lawyer use some surprising methods of defense, with shocking consequences for Detective Amaro.