The life of little cat Chi is so exciting! Suddenly, a delicious birthday cake appears on the table at home, and the vacuum cleaner brush attachment is perfect for a purring massage. Outside, Chi tumbles through the park with new playmates, and in the evening, the Black cat is waiting for the little one. Thanks to the new cat flap, the nighttime adventure tour can begin! A small, cute kitten has gotten lost. There isn't much time to be sad, as it is taken in by the Yamada family, who quickly wraps it around their finger. For Chi, it's time to explore the world. And she does so - full of energy and passion - together with three-year-old Yohei. The right food, trips to the litter box, fun toys, the first bath, and the necessary cuddles are just the first steps in living with the new family member.