Fugitive bank robber George Munro's dramatic escape from Yuma Prison was taken as a personal affront by his captor, Marshal Sean Barry. Having finally tracked his quarry down to the sleepy border town of San Tomas, Sean is disappointed to find only a grave. What is worse, the dead man's twin brother is a crusading priest determined to rid San Tomas of the ex-Confederate marauders who are now plundering the town of its wealth, led by the ruthless Colonel Silas Quinn. Can Sean help the cleric win his fight? Aided by Chiquita Sabatini, Quinn's downtrodden mistress, and the plucky Pedro Hernandez, Sean must battle against Apaches, bandits and Quinn's men to recover the money stolen from the people of San Tomas and free them from Quinn's rule.