When a gigantic, unearthly monster suddenly looms over a Japanese city, the expected reaction ensues: the Japan Self‑Defense Forces deploy tanks while the public panics. No one knows what the creature is or where it came from, but teenage girl Yuki holds a secret that may prove useful. Her friend Tetsu has been secretly caring for a bizarre creature named Cenco, which soon demonstrates remarkable, almost impossible abilities. A mysterious teenage boy arrives, claiming a connection to the attacking monster, and his unwelcome interest in Tetsu’s pet eliminates any doubt of a link, setting the stage for the impending battle.