Detective Benson (Mariska Hargitay) receives a forwarded 911 call from a nine-year-old girl who claims to have been locked in a room for days. When the detectives try to trace the call, they continuously get phony leads. This causes the detectives to think the call is a prank. Benson however is the only one with whom the girl will speak, and also the only one who believes that the call is real. With little time left to save the girl's life, Benson must come up with a way to find her.