Under The Sea:A Descendants Story

One goal, one necklace. Uma and Urson were separated when they were being born. Urson envied Uma for having the key to the most powerful sea weapon:her mom's necklace. To get the necklace, Urson kidnapped Uma's crew, Harry and Gil, as well as Mal, Dizzy and Mike. The two twins must engaged in an epic water battle. *what happens here is connected to the Moors.*