Tanaka, a scientist with a past, is unable to face the sight of the atrocities he committed as a germ-war researcher during WWII. Martin, miraculously returns from the dead, recruits an ace but evil Ninja, Simon, to retrieve Tanaka and the formula. Lung, a master of a lost art joins the battle and goes head-on with Simon.
The Japanese samurai and the Chinese martial arts finally encounter. battle between Ninjitsu finally starts. At the same time, Tanaka takes the plunge. In a burnt laboratory, he uses the golden horn to locate the germ formula. Despite the heroics, Tanaka's gang is pursued once again by Martin, Daniel and Simon. Tanaka finally gets the formula but it is shot from his hand again. The ghostly image floods Tanaka's mind and he is left laughing in an insane heap.