It's the middle of World War 2, and Evelyn's father is away in Europe. When she and her cousins, Katy and Paul, are invited to stay with their mysterious great-aunt for the summer, they think they are leaving worries of the war behind them. But they have no idea the secrets they will find in their aunt's home. They have no idea that they will be thrown into another war, this one far more extraordinary than the one their fathers are fighting in.