One morning, single mother Alice finds a stranger outside of her home on the British coast. He has no coat, no ID, and can't remember how he got there—or what his name is. In a London suburb, Lily calls the police to report her new husband missing, which is when she learns that the person she married does not exist. Two decades earlier, teenage siblings Gray and Kirsty are on an annual family vacation when an older man sets his sights on Kirsty. Gray senses trouble, but can't get anyone to take him seriously. Lisa Jewell weaves these three story lines tantalizingly together in this fast-paced, unputdownable thriller!