A Nazi scientist, wanted as a war criminal, develops a spider serum that turns people into fascist Nazi zombies. A pair of investigators who have devoted their lives to hunting down Nazi war criminals set out to stop him.
Several pillars of society have robbed an Army safe containing $100,000 so they can buy the land upon which the coming railroad will be built. But they haven't reckoned on the presence of the master gunslinger, Sabata.