Sophie Turner stars as Joan Hannington, a penniless mother who becomes addicted to the thrill of crime in 1980s London. Joan, a devoted mother io her six-year-old daughter, is trapped in a disastrous marriage with a violent criminal named Gary (Nick Blood). When Gary goes on the run, Joan seizes the opportunity to create a new life for herself and her daughter. Adopting new identifies and making new acquaintances along the way, Joan becomes a masterful jewel thief. She embarks on a thrilling, high-stakes journey that challenges her every limit, driven by her desire to care for her daughter and create a secure home for them both.