The chilling new psychological thriller from the bestselling author of I Am Watching You. On a train with her husband, miles from home and away from their young son Ben, Sophie receives a chilling phone call. Two boys are in hospital after a tragic accident. One of them is Ben.

Sophie thought she could trust Emma, her new friend, to look after her little boy. Emma's a kindred spirit - someone Sophie bared her soul too, despite the village rumours. But Sophie can't shake the feeling that she's made a huge mistake and put her family in danger. How well does she really know Emma?

Time is running out. Powerless to help her child, hours from home, Sophie is about to discover the truth - and her life will never be the same again.