Synopsis

The Japanese ambassador is traveling through the Wild West by train, when gangsters hold up the train, to rob a gold shipment. They also carry an ancient Japanese sword the ambassador was carrying as a present for the US president. The ambassador's bodyguard (Toshiro Mifune) will go after them, with the aid of one of the gang's leaders betrayed by his pals...

The Japanese ambassador is traveling through the Wild West by train, when gangsters hold up the train, to rob a gold shipment. They also carry an ancient Japanese sword the ambassador was carrying as a present for the US president. The ambassador's bodyguard (Toshiro Mifune) will go after them, with the aid of one of the gang's leaders betrayed by his pals...