A biographical crime drama film based on the story of Sharon Carr, one of the youngest female murderers in the United Kingdom. Sharon Carr is a 12-year-old Belizean girl newly arrived in the UK who discovers she feels a unusual pleasure in hurting and witnessing the pain of others. One night, after murdering an 18-year-old girl and subsequently injuring her classmates, her identity as a little psychopath and killer comes to light, shocking the entire country.