Lady, an Irish Setter puppy, is leading a simple life on a farm in Ohio during the 1940's. Lady's biggest desire is to become an expert hunting dog like her mother. She has no idea that her life is going to take her down a path where she will find herself in the middle of incredibly dangerous situations, including a world war. On several occasions, Lady will have to find the courage to risk her life in order to save someone she loves. The loyalty and bravery that Lady shows throughout her lifetime illustrate what it truly means to have the heart of a hero.