This Five-part BBC psychological drama follows Ivy Moxam, a 26-year-old woman who was abducted when she was 13 and held captive for the next 13 years. The story begins as she escapes the cellar she was being held in and goes to the police station to report her ordeal to D.S. Lisa Merchant and D.I. Elliott Carne. But as she narrates and relives her experiences with the police, cracks begin to appear in Ivy's version of events leading the officers and her family to question her story. Will she ever reveal the truth about what she experienced in her captor's house?