प्लॉट

Her life in turmoil Audrey has nothing left to loose, she steals the crown and Maleficent's scepter becoming an evil witch, casting a sleeping spell throughout the land. Mal, Evie, Jay, their friends and former foes team up to make peace.

Mal (Dove Cameron) Maleficent's daughter, Evie (Sofia Carson) daughter of The Evil Queen, Jay (Booboo Stewart) Son of Jafar, and Carlos (Cameron Boyce) son of Cruella De Vil, visit the Isle of the Lost to choose four new villain's kids (VKs) to take to Auradon. Mal was born on the Isle of the Lost, where all the villains had been banished and locked away for good. Prince Ben had argued that kids could not be held responsible for their parents' actions and so 4 VKs were given the chance to come to Auradon, and since then it became an annual ritual.

They pick Dizzy (Anna Cathcart), daughter of Drizella and granddaughter of Lady Tremaine, Celia (Jadah Marie), daughter of Dr Facilier, and Squeaky ( Christian Convery) and Squirmy (Luke Roessler), the twin sons of Mr Smee. Mal says that they would be back to pick up the new VKs in one week.

The day the kids are to be picked up, Ben (Mitchell Hope) son of Belle (Keegan Connor Tracy) and Beast (Dan Payne), Mal's boyfriend and the king of Auradon, proposes to her, which she accepts. Ben's ex-girlfriend Audrey (Sarah Jeffery) daughter of Princess Aurora and Prince Phillip seethes with jealousy and her grandmother Leah (Judith Maxi) admonishes her for failing to secure the family legacy by marrying Ben.

When the barrier is opened for the new VKs, Hades (Cheyenne Jackson), the god of the underworld, attempts to escape, but Mal beats him back in her dragon form. Mal could feel that Hades was trying drain her magic powers away with his ember. Leah uses the opportunity to remind everyone that Mal is not fit to be Queen as she was barely able to protect her subjects.

That night, unable to contain her jealousy of Mal, Audrey steals the Queen's Crown and Maleficent's Scepter from the Auradon Museum. Audrey had decided to be the Queen of Evil. The theft and Hades' escape attempt has the citizens panicking. Beast argues that every time the barrier is opened, it exposes Auradon to danger in the form of Maleficent, Uma and now Hades. Mal, as future Queen, decides the best way to protect the subjects and restore peace is to close the barrier permanently, meaning no new VKs can come, nor can anyone enter the Isle. Mal tells the plan to Evie.

Audrey attacks Mal with Maleficent's scepter, turning her into an old hag. Mal and the other VKs go to the Isle to get Hades' ember, the only thing powerful enough to break the scepter's curse. Mal is restored upon entering the Isle, due to the suppression of evil magic there.

Celia gets Mal into Hades' lair, but he thwarts their effort to steal the ember. He is revealed to be Mal's absentee father who abandoned Maleficent as she was not easy to live with. Mal says that for 16 years she had nothing and now she has an entire world, where she is accepted and adored. And without the ember, it will all be over. Hades reluctantly gives her the ember, warning her that it mustn't get wet. Since she is only "half Hades", it may not do everything for her that it does for him. Mal tells Celia that apart from her, only Evie knows that Hades is her father.

While leaving the Isle, Mal and the others are stopped by Uma (China Anne McClain) Daughter of Ursula, Gil (Dylan Playfair) son of Gaston, and Harry (Thomas Doherty) son of Captain Hook, who take the Ember. Uma was already outside the Island of the Lost, hiding in the waters, and Gil and Harry followed Mal and the others out when they open the magic shield. Uma says that all this time she was looking for a hole in the shield surrounding the Island. They agree to help after Mal falsely agrees to release all the children from the Isle.

In Auradon, Audrey attacks Jane's birthday party with a sleeping curse. Chad (Jedidiah Goodacre) son of Cinderella and Prince Charming, obsequiously aligns himself with Audrey, while Jane (Brenna D'Amico) daughter of the Fairy Godmother, escapes into the Enchanted Lake. As the entire kingdom falls under Audrey's spell, she offers to reverse it if Ben will marry her. He refuses, so she turns him into a beast and begins turning people to stone.

Mal and Uma, vying for leadership of the VKs, return to Auradon with their friends. Despite their bickering, they defeat suits of armor animated by Audrey. Uma finds Audrey's diary and learns she spends time at Fairy Cottage, a contribution for which Mal thanks her. Evie, nervous to define her feelings for Doug, wakes him with "true love's kiss." Carlos calms him after removing a splinter from his hand, while Jane restores him to human form with the enchanted lake water. As Mal and Uma are thawing towards each other, Audrey traps them in Evie's house. They reverse Audrey's spell by combining their magic, and the kids reunite there.

At Fairy Cottage, the kids find only a shell-shocked Chad. When Mal admits that she plans to seal off the Isle permanently, the group implodes and Celia, learning she can never see her father again, throws the ember in a birdbath and Uma and Harry leave. After Evie tells Mal how upset she is for lying to her and their friends, they are all suddenly turned to stone, minus Mal. Audrey takes Celia hostage and attacks Mal, who turns into her dragon form.

Realizing she is Mal's only hope, Uma combines their magic to reignite the ember. Mal overcomes Audrey, who falls comatose, and the curses are lifted. The ember could revive Audrey, but only in Hades' hands. Ben agrees to send for him, while Uma, Harry, Gil, and Celia plan to return to the Isle. Mal apologizes for lying. Her friends and former rivals forgive her as they understood that she was just trying to do the right thing. Hades arrives and revives Audrey but decries the double standard by which Audrey is immediately forgiven because she is not considered a villain. Mal and Ben apologize to Audrey and in response, Audrey and Leah apologize to Mal.

Mal announces that she cannot be the Queen of Auradon unless she can also be the Queen of the Isle because everyone is capable of being good and bad. With Ben and the Fairy Godmother's (Melanie Paxson) agreement, Mal removes the barrier and creates a bridge, and the people of the newly merged society celebrate. In the end, Evie is with Doug, Carlos is with Jane, Mal and Ben are engaged, Jay and Gil plan to travel the world together, and Audrey seems to become romantically attached to Harry after Uma rejects him.

Mal, Evie, Jay and Carlos are seen looking at the Isle of the lost and then racing across the bridge to their parents.