A terrorist organization called Red Bamboo runs a heavy water factory on Letchi Island. By controlling the sea monster, Ebirah, they keep the natives of Infant Island enslaved. While a crew of a sea cruiser that crash-landed on the island tries to flee from the baddies, Godzilla is awaken, and he's their only chance to defend themselves and put an end to the sinister organization once and for all. (1966 film, a.k.a. "Godzilla Versus the Sea Monster")