Go-chan comes to Earth searching for the heart plasma that can bring peace back to his home planet, EX Panda. There he meets Moko, a girl who lives on a farm with her grandfather, along with a group of odd animals known as the Chinjuumin. Their days together are happy ones until people start invading the Chinjuumin's forest home with plans to capture them. At the same time, Moko's home life becomes more complicated when her grandmother arrives from the city. The result is a feature-length adventure film that pairs an alien visitor's quest with a threat to the forest and changes within Moko's family.