Between southern Montana and northern Wyoming, Sophie and Pongo meet the successors of the first Americans who wrote the history of the West. Jake, a cowboy, explains why his work on a horse is still relevant and necessary. On the Little Big Horn site, a Crow Indian woman tells the story of one of the most significant events in American history. But it is impossible to come to this region without spending a day in one of the world’s oldest natural parks, Yellowstone, and its spectacular sulphur emissions.