Julia Crowne arrives one afternoon at Westwood, a school somewhere in the U.K., to pick up her five-year-old daughter, Anna - but Anna isn’t there. Either the girl wandered off or she was kidnapped. A few days earlier, Julia asked her husband, Brian, for a separation. Once the story of Anna’s disappearance gets out, the press vilifies Julia, falsely labeling her as a negligent, mentally unstable adulterer who was planning on leaving her family. A week later, the police receive a call from a newsagent, who says that a little girl has walked into his store claiming to be Anna . Once Anna returns home, the nightmare is far from over, and Julia’s life unravels even more.