 Quite a bit of rustling has been going on in the territory of late.McCord is in cahoots with Indians, in particular Natchakoa of the Blackfoot tribe, whose braves stampede the Jones family's cattle, knock Sierra cold, wound her cowhand Nat and kill Pop, after which McCord steals a document from Pop's dead body that grants rights to the land.Sierra is nursed back to health by Colorados, a young Blackfoot who attends school among the whites, to the displeasure of the tribal chief, his father.