Matty Melgren is a convicted serial killer serving life without parole for the murders of several women in London in the 1980s. He has consistently protested his innocence, and the evidence against him was largely circumstantial. At the time of his arrest, Matty's girlfriend was Amelia-Rose, a single mother to 12-year-old Sophie. Sophie adores Matty. He's handsome, funny, respectable--she could never suspect him of the brutal killings in the headlines. Then a police sketch of a suspect is released that looks a lot like Matty. Was it him? Sophie is consumed with doubt and guilt, causing her to act impulsively, ripping her family apart. Years later, she is still haunted by her actions. Was she wrong to have done what she did all those years ago? Then Sophie receives a letter from Matty--he's dying and asks her to visit him in prison. Will she finally get the answers she needs to be able to reclaim her future?