Liverpool, 1939. The Second World War is about to start when pretty Laura Oliver meets Queenie Todd. Laura is twenty-one and happily married. At fourteen, Queenie lacks Laura's confidence and has been deserted by her good-time mother. The two become friends, but when the air raids begin Queenie is trusted to look after two young children, and the three of them are evacuated to a small town on the coast of Wales. At first, it is a haven of peace and quiet. The girls have a wonderful time - and then something happens, so terrifying that it will haunt them for the rest of their lives.