A cowhand named Bob Blake visits with Sally Thompson and her kid-brother, Jimmy, on their hard-scrabble homestead adjoining the Steele Ranch where Bob works. He learns that their father just died, and he plans on seeing if he can make things a bit easier for them.

Mary and Bobby Trevor are castaways befriended by Tarzan. When Lord arrives, looking for the family heir, Black John tries to fill that role and marry Mary in England. Tarzan shows up and marries her instead.

Escaping from the law once again, Billy, Fuzzy, and Jeff ride to the ranch of Jeff's uncle only to find another family living their. They soon learn of Cobb Allen's scheme where he sells a ranch, makes sure the rancher can't pay off his note, kicks him out, and resells the ranch. But Billy has a plan to recover the ranchers' money and he sends Fuzzy to town with a fake map to a gold treasure.