Once in the Shōwa period, the defunct Japanese army intended to approach Henry Pu-yi, the last Emperor of the Ching Dynasty in their effort to take advantages. However, they were defeated by the Imperial guards who utilized the martial art called Hakkyoku-ken. During World War II, the Japanese army research the mysteries of Hakkyoku-ken to create supersoldiers, developing the ultimate martial art.

Approximately half a century has passed since then, the ultimate World Fighting Tournament is about to start, and all kinds of fighters from around the world engage to determine the world's best. Behind the Tournament, however, there exists an intrigue designed by a sinister syndicate.