Chi is just your average little mackerel-stripe kitten, who lost her mother and is taken in by the Yamada family. She is finding out about the world, the good (sushi) and the bad (the vet). In one of her little journeys, she meets a big cat, which becomes a sort of "mom" to Chi. Chi is very stubborn, and likes to play.

She's also very affectionate and loud, which is not good because cats are forbidden in the apartment complex where the Yamadas live.