When one of Phaedon's magical spells fails, Thalia's reflection in a pool comes to life. The evil double takes Thalia's place. Although the fairies are astonished by Thalia's strange behavior, only Daiman realizes that Thalia is not herself. When Lord Kann tries to use the double to the elves' advantage, the fairies capture Daiman. Thalia's friends are the only ones who can help free her and defeat the evil twin.