After getting sprung from prison by a Mexican bandit, a bounty hunter is hired to protect a town by the father of a saloon girl killed by a member of the bandit's gang.

Bandit Gordo frees a group of prisoners, forcing them to join his gang or die. Arizona Colt, declining to do either, heads for Blackstone City where Gordo is planning a robbery. When one of Gordon's men murders saloon girl Dolores, Arizona offers to hunt down the killer for the price of five hundred Dollars and Dolores' sister, Jane—Tom Seldon <[email protected]>