Native American rodeo rider Joe Lightcloud is a Navajo whose family still lives on the reservation. He returns to the reservation in a white Cadillac convertible that he uses to drive cattle.

Joe persuades his congressman to give him 20 heifers and a prize bull so that he and his father can prove that the Navajos can successfully raise cattle on the reservation. If their experiment is successful, the government will help all the Navajo people. But Joe's friend Bronc Hoverty accidentally barbecues the prize bull, while Joe sells the heifers to buy home improvements for his stepmother Annie Lightcloud.

Joe is able to borrow a bull named Dominick, but the bull is homosexual and shows no interest in the heifers. Mamie Callahan, the daughter of shotgun-toting tavern owner Glenda Callahan, can't seem to stay away from the girl-chasing Joe. Joe trades in his horse at a used car dealership for a red convertible automobile from which he sells off the parts to obtain cash from a salvage yard. After almost all of the usable car parts are sold, Joe rides around on a beat-up motorcycle.

To raise money, Joe organizes a contest in which riders have to ride Dominick the bull. Joe has to ride Dominick and hang on in order to win the prize money, which he does. In a fight at his father's house, Joe and his friends are involved in a large fight that destroys the house that they have been building.

(Movie overview by Wikipedia)