A bounty hunter named Arizona helps a group of beleaguered farmers in their fight against a large landowner named Austin Styles and his gang of outlaws.

A band of outlaws has assaulted the car that carries the state tax. Oswald, the most powerful man in Montana, is celebrating the success of the robbery as an accomplice steal to him $ 300,000. The sheriff is determined to get evidence against Oswald and to judge. All suspect that Roger seeks the sheriff protection, promising evidence against Oswald.

The improvised spy, Jaime Bonet, must go to Barcelona to recover a stolen microfilm which is hidden in a soccer ball.