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 - and the dead man's twin brother, a crusading priest. Father Joseph Munro is determined to rid San Tomas of the ex-Confederate marauders, led by the ruthless Colonel Silas Quinn, who brutally control the town. Can Sean help the cleric win his fight?