It's 1895 and fourteen year old Hannah Brandt is struggling with the hard life on a new Nebraska homestead. When her imagination is captured by a wild filly she becomes obsessed with horses, which opens the door to her destiny. Just four years later she enters the first Cheyenne Frontier Day rodeo where she wins the relay race and her fate is sealed. She gives herself a new name, Sunny Gale, and pursues a rodeo career, much to the disgust of her...