When Mal and her friends Evie, Carlos, and Jay all receive threatening messages demanding they return home, she can't believe it. Sure, she's King Ben's girlfriend now, and she's usually nice to her classmates, but she still didn't think anyone would be silly enough to try to push her around. The thing is, it kind of worked. Especially since she and her friends have a sneaking suspicion that their villainous parents are behind the messages. And when Evie looks into her magic mirror, what she sees only confirms their fears. Whatever's going on, Mal, Evie, Carlos, and Jay know they have to sneak back to the Isle and get to the bottom of it. Without its infamous leader, the island's even worse than when they left it. Will the kids be able to beat the evil bubbling at the Isle's wicked core, or will the plot to destroy Auradon succeed?