The Swan Princess: The Mystery of the Enchanted Kingdom (alternatively subtitled as The Swan Princess: The Mystery of the Enchanted Treasure) is a direct-to-video film and the third installment in the The Swan Princess franchise. It was released in 1998, directed by Richard Rich, and features the voices of Michelle Nicastro and Brian Nissen as Odette and Derek. This film follows Derek and Odette having to deal with Zelda, a sorceress, who is seeking the Forbidden Arts and wishes to use it to destroy their happiness.
This sequel features the returning voices of Michelle Nicastro and Steve Vinovich from the first film, with all the other characters being re-cast. The film was followed by another direct-to-DVD sequel: The Swan Princess Christmas which was then followed by a fourth sequel, The Swan Princess: A Royal Family Tale.