Nobita and his father purchase a massive rhinoceros beetle, promising to nurture it with care for years. Later, Doraemon"s adventurous crew discovers a remote island in the dense jungle, surrounded by crystal waters, where an ancient tribe coexists with long‑forgotten prehistoric beasts, safeguarded by the mythical beetle spirit Golden Hercules. Yet they confront a ruthless band of future thieves intent on capturing Golden Hercules for profit.
