Based on the manga by Osamu Tezuka, Magma, a long-haired golden transforming giant, helps young boy Mamoru Murakami and his news reporter father Atsushi save our world from space invader Goa and his legion of henchmen and giant monsters.

The alien invader Goa plots to conquer the Earth. He first warns the Murakami family (father Atsushi, mother Tomoko, and son Mamoru) of their invasion, and demonstrates his powers by transporting them to a prehistoric jungle and destroying a Giant Dinosaur before their very eyes. But they will not agree to surrender to Goa, so hope comes in the form of Magma, an armored, golden giant with long hair and antennae. He and his human-sized wife Mol, both created by the wizard Earth are sent to defend the world against Goa.—jackpittorino-6-215401