The origins, exploits and the ultimate fate of the Jesse James gang is told in a sympathetic portrayal of the bank robbers made up of brothers who begin their legendary bank raids because of revenge.

Legend says that Antonio Bay was built in 1880 with blood money obtained from shipwrecked lepers, which no one believes. On the eve of the town's centennial, many plan to attend the celebrations, including the murdered lepers.

The sole surviving Texas Ranger of an ambush arranged by Butch Cavandish returns to fight back as a masked hero.