Japan is thrown into a panic after several ships explode and are sunk near Odo Island. An expedition to the island led by paleontologist Professor Kyohei Yemani soon discover something…

A 400-foot (122-meter) dinosaur-like beast, awoken from undersea hibernation off the Japanese coast by atomic-bomb testing, attacks Tokyo.

A young samurai, Shojuro Sako, travels on the Tokaido to Edo with his two servants, Genta and Gonpachi. Gonpachi has been told by Shojuro’s mother to prevent his Master from…