After Ariel, Moana, Tiana, Rapunzel, and Snow White successfully stopped Gaston’s attempt to seize control of their realms, he enlists the help of Ursula, Jafar, and the Evil Queen to finally defeat the Princesses. Upon discovering Gaston’s plot, the Princesses, with the assistance of the Magic Mirror, gather allies of their own, including Aurora, Belle, and Cinderella. United, the Princesses prepare for an epic battle between the forces of good and evil.