A meteor lands in Japan and unleashes hundreds of insect-like "Legion" creatures bent on colonizing the Earth. Gamera shows up to deal with the ever-evolving space adversary but the battle may result in him losing his bond with humanity.

A strange meteor lands in Japan unleashing hundreds of insect-like "legion" creatures which find their way into Tokyo. When the military fails to control the situation, Gamera shows up to deal with the ever-evolving space adversary.—Alex Smits