Whoever marries the beautiful Princess Ukio will become the ruler of the world. Lord Donjo (Akira Nakao) makes a deal with the evil magician, Kashin Koji to help take over the throne of the Shogunate by marrying Ukio. When Kojis five deadly monks capture Ukios twin sister Kagura Ibi, Jotaro (Hiroyuki Sanada) heads after them to rescue both Ukio and Kagura with the help of a mysterious ninja, who is none other than famous Samurai Muneyoshi Skishusai Yagyu played by Sonny Chiba.