While on a pleasure jaunt, Ruth Fielding and her friends decide to attend Dakota Joe's Wild West Show. After the girls park their car, an enraged bull charges them. The bull is shot by an Indian girl named Wonota, who works in Dakota Joe's show. Ruth is grateful and thanks the girl later. Ruth notices that Dakota Joe treats Wonota cruelly and decides to see whether she can get Wonota away from Dakota Joe.

Ruth believes that Wonota would be successful in the moving pictures, so she enlists the help of Mr. Hammond, and a way is found to break Wonota from her contract with Dakota Joe. Mr. Hammond and Ruth agree that Wonota will be perfect in Ruth's next film. Filming begins, but Dakota Joe is determined to seek revenge upon Ruth and follows the film company during filming. Dakota Joe tries several times to injure both Wonota and Ruth.

The threat of Dakota Joe continues to loom over Ruth, and she hopes that filming can be completed without any major mishap. The problem of Dakota Joe is eventually solved, and Wonota's father, Chief Totantora, comes home from Europe where he had been imprisoned during the war.