Sam, the 12 year old son of a famous missing polar explorer, has despaired. His mother has married again and moved with him and her new husband to the wasteland of Canada. He doesn`t like him, the place, and has problems finding new friends. One day he meets a wild dog which one looks like the leader of his father`s sled dogs. With him and the two family dogs he plans to compete in this year`s sled dog race. He is getting closer to the neighbour`s daughter who is able to build the sled. But her father wants to kill all wild dogs...