Little Willy lives on a potato farm in Wyoming with his grandfather. When his grandfather falls ill, the local doctor gives up on saving him. Determined to help, Willy decides to enter a dogsled race to win the cash prize for the medical costs and taxes needed to keep their farm. The story follows Willy as he trains with his loyal dog Searchlight for the climactic race against Stone Fox, a Native American racer. Willy must win the race in order to save his grandfather's life and their home.