This series follows the police investigation into school assistant Maxine Carr and her fiancé Ian Huntley, who was later jailed for the double murder of schoolgirls Holly Wells and Jessica Chapman, the tragic case that shocked the nation. The drama explores, from Carr's perspective, her tumultuous relationship with Huntley; why she lied for him and how she became public enemy #1. It also reflects the scale of the police investigation into the murders and the subsequent media frenzy surrounding the largest manhunt in British history.