Professor Yamatone and his family visit present day Egypt, and discover an ancient tomb belonging to a god of justice and protector of the weak known as Ogon Bat. When the Professor is taken captive by Gorgo, agent of the evil Dr. Erich Nazō (ナゾー), his daughter Mari pleads for Ogon Bat to save her father. As she starts to cry, her tears fall in Ogon Bat's tomb and revive him. From then on, Mari calls on Ogon Bat to fight against evil.
