Kumi-Kumi is a collection of amazing islands with picturesque landscapes, inhabited by magical creatures named Yumi, Shumi, and Jumi. They treat each other with disdain as neighbors and actively avoid interacting, even though they speak in a language called "Tarabarsk" that everyone understands. The story revolves around Dzhuga, Yusi, and Shumadan, representatives of different tribes. They reject societal stereotypes and form a close friendship, despite their differences in personalities and perspectives on the world.