When a barrier breach jeopardizes the safety of Auradon, Mal resolves to permanently close the barrier. However a mysterious dark force continues to threaten the people of Auradon.
The saga of good versus evil continues as the VKs Mal, Evie, Carlos and Jay return to the Isle of the Lost to recruit a new batch of villainous offspring to join them at Auradon Prep. When a barrier breach jeopardizes the safety of Auradon during their departure off the Isle, Mal resolves to permanently close the barrier, fearing that Uma and Hades will wreak vengeance on the kingdom. Despite her decision, a dark force threatens the people of Auradon, and it's up to Mal and the VKs to save everyone in their most epic battle yet.