A man posing as a doctor tells Tonto's tribe that their water supply is contamined with typhus and that they must move their campsite or die. Tonto discovers that the man is actually a railroad promoter and is trying to take the tribal lands for the railroad.; Tonto saves a friend of his from a lynch mob that has accused him of rustling horses. After the escape, Tonto and War Feather track down the real rustlers and help the ranchers recover their horses.