This internationally produced epic actioner is based upon the true story of a samurai assigned to guard a Japanese diplomat who has come to the US to present the President with a bejeweled sword as a token of esteem. They are aboard a train when two American robbers jump them and grab the precious blade. Later one of the French thieves takes the sword and abandons the other. The double-crossed criminal, and the dishonored samurai then team up to bring back the purloined sword. En route, they pause for refreshment in a brothel populated by voluptuous Italian beauties. Just as they catch up with the wily French crook, the three are set upon by fearsome Commanche raiders and are forced to work together. Unfortunately, only the American thief survives. Still, he decides to do the honorable thing and return the sword to the Japanese diplomat.