When a teenage girl is found beaten and raped in the grounds of a derelict asylum, FBI agent Ren Bryce is called in to assist. But she is soon diverted to a missing persons' case when a eleven-year-old girl and her teenage babysitter vanish without a trace from their hotel room. Faced with conflicting evidence and inconsistent witnesses, Ren works obsessively to unravel the dark family secrets at the heart of the case, before it's too late.