Fran Hall and her husband Nathan have moved with their two children to a farmhouse on the edge of the Fens - a chance to get away from London and have a fresh start. But when Fran wakes one night to find Nathan gone, she makes a devastating discovery. As questions about her husband and her relationships start to mount, Fran's life begins to spiral out of control. What is she hiding from the police about her marriage, and does she really know the man she shared her bed with?