The Isle of The Lost is a dark place where all villains were sent away, along with their future children. Uma and Harry were some of them. Uma had always been an outcast, but rose to royalty as she became Queen of The Isle. On the Isle, there are rules. No Sadness. No Happiness. No Love. Nothing. But little do Uma and Harry know, love can be an amazing thing.

When Mal starts to feel the pressure to be royally perfect, she decides to leave Auradon and go back to her rotten roots on the Isle of the Lost. But, when she discovers that Uma, the daughter of Ursula has took control over the ran down town, she finds out that her and her pirate crew are finalizing plans to break down the barrier. So, When her friends come to help her, Ben comes along and gets kidnapped so Mal and Uma are in a big battle for the wand for the crown and freedom from the Isle of the Lost.