Mia is called back to the fantastic unicorn world of Centopia, where she meets Iko, an elf from Lotus Island who desperately needs her help. Toxor, a monstrous, toad-like villain is taking over the island, transforming its inhabitants into an army of will-less henchmen with his dark magic. Can Mia and her old and new friends follow in the footsteps of the mythical heroine of Centopia to unite three ancient, magical power stones to defeat Toxor?