Liverpool, 1939. The Second World War is about to start when pretty Laura Oliver meets Queenie Todd. Laura is 21 and happily married. At 14, 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.