Gamera vs. Gyaos

A series of volcanoes erupt in Japan. The eruption at Mt. Futago attracts Gamera, whose arrival is witnessed by a young boy. A research team is dispatched to the volcano to find Gamera and study the effects of the eruption. Meanwhile, Chuo Expressway Corporation is building a roadway nearby, but local villagers refuse to leave. The research team's helicopter is destroyed by a sonic beam emitted from a cave.