"If at all possible, send or take your household animals into the country in advance of an emergency. If you cannot place them in the care of neighbours, it really is kindest to have them destroyed." Joanna Ryan's father has gone off to war, leaving her in the care of her step-mother, a woman more concerned with having a good time than being any sort of parent to her. But then she finds a puppy, left for dead, and Joanna becomes determined to save him, sharing her meagre rations with him. But, in a time of war, pets are only seen as an unnecessary burden and she is forced to hide her new friend, Harry, from her step-mother and the authorities. With bombs falling over Bristol and with the prospect of evacuation on the horizon, can they stay together and keep each other safe?