A Civil War hero learns the culture of the Sioux by living with them.

Boss Spearman, a rugged old-timer, free grazes cattle. He and Charley have been partners for ten years. The pair and their employees, Mose and Buttons, are driving their cattle across the West. Mose is attacked and thrown in jail during a visit to a town. The local cattle rancher, Baxter, wants the free grazers off his land and when Boss and Charley retrieve Mose, they are warned that they have until the next day to be out of the area. Charley confesses...