'I slit someone's throat, ' the man told the woman on the 4.20 from Waterloo to Portsmouth.' Two strangers. One shared interest. Murder. Ben slit a man's throat. Sandra's son, Carl witnessed a murder. With Carl on a Witness Protection Programme, Sandra fled London to live anonymously in a remote village on the Isle of Wight where she becomes increasingly isolated and vulnerable. Terrorised by an unknown stalker, the police are unable to help and she turns to Ben. What makes a respectable, middle-aged woman want to sleep with a killer? More importantly, can the relationship give her the love...