The story is about a kitten, Little Keys, who loves to play the piano. When
her family is forced to move and can’t take the pet with them, Little Keys
leaves her hometown in Niigata to go to Shibuya in Tokyo. She makes new
friends there and finds her way as an independent “stray” cat. The story,
though a fantasy, gives a realistic look of life in Tokyo. The book is
supplemented by new photos taken by the author and helpful maps readers can use to follow the action.