Imprisoned on the Isle of the Lost, the teenaged children of Disney's most evil villains search for a dragon's eye--the key to true darkness and the villains' only hope of escape.
When they begin receiving threatening messages they believe are from their villainous parents, Mal, Evie, Carlos, and Jay know they must return to the Isle of the Lost to find out what is going on before the plot to destroy Auradon succeeds.
When King Triton's trident enters the Isle of the Lost, Mal, Evie, Carlos, and Jay devise a plan to find the magical object before Mal's wicked rival Uma can get her hands on it.
Mal, Evie, Jay and Carlos make a plan to use their upcoming visit to the Isle of the Lost to help other villain kids attend Auradon Prep, while Uma teams up with Hades to bring down the barrier and get her revenge on Mal.