Hopi, Toto, and Mao are three cat friends with a big goal: founding a new town of their own. They head out onto the ocean hoping to locate the mysterious Island of Stars. By chance they come across it, and they set to work developing the island right away. The job turns out to be far from simple, and the trio runs into one difficulty after another as they try to turn their discovery into a town. Told in short episodes, the series blends adventure with slice-of-life storytelling.