On a mission to find heart plasma to restore balance to EX Panda, Go-chan travels to earth. During his journey, he befriends Moko, a farm girl who lives with her grandfather, and a group of peculiar creatures called the Chinjuumin. However, chaos erupts when humans invade the Chinjuumin's forest to capture them. Meanwhile, Moko's family situation becomes complex as her city-dwelling grandmother makes an appearance.