A moon base is destroyed by a spaceship from Zigra which is looking to take over the planet earth to use its oceans for its ocean-dwelling denizens. Gamera must once again come to the aid of the human race while all of Japan roots him on.
Kuramoto, who works for a large trading company, is a skilled employee who is well-liked by the company president. He is engaged to an employee named Nishino Etsuko, but he used her for his own career advancement and kills her so that he can marry the company president's daughter. When Kuramoto returns from his honeymoon with his new wife, Etsuko's brother shows up in search of the whereabouts of his missing sister.
Eighth film in the long-running series Daiei Studio's Woman Gambler with Kyoko Enami starring where she plays the woman gambler Ogin.
