John Sims, Yuma's godfather, saves him from an attack by Indians at his campsite. He asks Yuma in turn to help him track renegade Indian Masi and take his scalp, as revenge for the killing of his wife.

George Campbell, who blames Yuma for his brother's death in the war, provokes a gun battle in which Yuma is wounded after being forced to kill Campbell's nephew. Yuma's godfather John Sims then comes to help Yuma escape from Campbell's vengeance.