Flora Hawks is in love with the overseer of Tarzan's African estate. After a search for a legendary city of diamonds, Tarzon races with his pet lion Jad-bal-ja to save Haws from being sacrificed to a lion-god.

Elmer owns a gas station out in the California desert. Soon he has a business rival in Jim, who opens up another station, and is also trying to steal Elmer's girlfriend. She plays both rivals against the other and, because she is a baseball fan, both Elmer and Jim try to show each other up in the big local baseball game.