In the Post-Civil War West, Nigger Charlie (Fred Williamson) rallies to the cause of black emigrants and former slaves who are being captured and taken to Mexico, where a fanatical Confederate general is trying to re-create his fortunes. Tough and resourceful, Charlie ambushes the raiders and hijacks a gold shipment with which he hopes to buy the freedom of blacks already enslaved by the general's cruel henchmen. But the general threatens to kill his prisoners, so Charlie enlists the unlikely aid of a Mexican bandit (Armendariz) and wins out in a pitched battle. Raw action and romance supplied by Denise Nichoas make this a satisfying tale of retribution.