For years and years, a plague called Rocky Mountain Spotted Fever had ravaged the people living in the bitter root valley of America's great mountain range, the Rockies. To destroy it, a group of American scientists devoted the labour of their lives. The story begins in Montana over a century ago, where a group of pioneers are searching for a homestead to settle. Ahead of them rides an Indian, who guides them. As they enter a beautiful valley, the Indian suddenly stops and refuses to travel any further...