This tense psychological drama follows the story of Ivy Moxham, a 26-year-old woman learning to live again after 13 years in captivity. When Ivy escapes the cellar that's been her prison since she was abducted, it's just the start of her story. She's beginning to pick up the threads of a life half-lived, but they're about to be pulled apart again. Her captor is on the run, and as cracks appear in Ivy's account of her ordeal, the police begin to doubt her motives. What happened in that cellar? And can Ivy really be trusted?