A group of castaways finds themselves stranded on a remote South Pacific island, where they discover a terrorist organization is secretly developing nuclear weapons with the help of enslaved native islanders. Their only chance for survival lies with Godzilla, Ebirah, and Mothra, as the three legendary creatures must join forces to defeat the terrorists and save the island's inhabitants.

Gojira · Ebira · Mosura Nankai no daikettô
On a quest to find his missing sibling, a young adventurer stows away on a fugitive's vessel, only to have it wreck on Letchi island, where he uncovers a shocking secret: a group of native people are being held captive by ruthless terrorists.