A girl who vanished four years ago reappears with a tale of imprisonment and sexual slavery, but Benson and Stabler find themselves doubting her story as evidence and discrepancies keep mounting against it. Once the lie is known, the detectives are left with a traumatized victim whom no one believes, a horrifying truth that sends them scrambling to keep her out of the tombs, and another truth that may be discovered too late to save her life.