When men find gold in the frozen north of Canada, they need dogs-big, strong dogs to pull the stedges on the long journeys to and from the gold mines. Buck is stolen from his home in the south and sold as sledge-dog. He has to learn a new way of life -how to work in harness, how to stay alive in the ice and the snow... and how to fight. Because when a dog falls down in a fight, he vever gets up again.