Peta a Golden Cat and a human called Maria, fall through a headboard into an amazing world called Middlestop. In this strange world there are homes that expand to fit whoever enters them, unusual foods and thrilling encounters with many different creatures, A nasty Black Cat is menacing the people of Middlestop. It has been stealing people, and imprisoning them inside its cave, but with the help of some green mice Maria and Peta, expel the Black Cat out of Middlestop forever.