A secret, never-before-told tale of Cinderella! With the help of good fairy Crystal, Cinderella and her three mouse friends are able to escape the attic they live in and make it to the Royal Ball at the palace ... but they soon discover a terrible secret. The real Prince has been turned into a mouse by an evil witch ... and the "Prince" standing in front of everyone at the Ball is an impostor! Cinderella and her faithful, furry friends must embark on an all-new adventure to restore the real Prince to his true form and help him defeat the forces of darkness.