Ebirah, Horror of the Deep

A young man gathers two friends and sails into the South Pacific in search of his brother. En route, they encounter a fugitive who takes them on his escape. Caught in a severe storm, they arrive at Letchi Island where natives of Infant Island have been enslaved by the terrorist organization Red Bamboo. Red Bamboo runs a heavy water factory to process a juice, which holds off the monster Ebirah. The young men meet a beautiful but tough Daiyo, who has escaped her captors, and they wake up Godzilla to put an end to the Red Bamboo. (official distributor synopsis)