When the pressure to be royally perfect becomes too much for Mal| she returns to her rotten roots on the Isle of the Lost where her archenemy Uma| the daughter of Ursula from The Little Mermaid| has taken her spot as self-proclaimed queen of the run-down town. Uma| still resentful over not being selected by Ben to go to btzz.org Auradon Prep with the other Villain Kids| stirs her pirate gang including Captain Hook's son Harry and Gaston's son Gil| to break the barrier between the Isle of the Lost and Auradon| and unleash all the villains imprisoned on the Isle once and for all.