Disney is gearing up to unveil a new live-action special based on its hit TV movie franchise Descendants on September 28 on Disney Channel.

Immediately following the Disney Channel premiere, Under the Sea: A Descendants Story will be available on the DisneyNOW app and on Disney Channel VOD. The special continues to tell the story of the teenage daughters and sons of Disney villains Maleficent, the Evil Queen, Jafar and Cruella de Vil, and will focus on rivals Mal and Uma in an underwater showdown.

The third Disney Channel movie in the franchise, Descendants 3, was announced earlier this year and is set to premiere in 2019 on Disney Channel. Its YouTube channel currently has 1.2 million subscribers and includes an animated short-form spinoff series called Descendants: Wicked World and activities such as DIY themed cupcake baking recipes.