Queen Poppy and Branch make a surprising discovery — there are other Troll worlds beyond their own, and their distinct differences create big clashes between these various tribes. When a mysterious threat puts all of the Trolls across the land in danger, Poppy, Branch, and their band of friends must embark on an epic quest to create harmony among the feuding Trolls to unite them against certain doom. When the Queen of the Hard Rock Trolls tries to take over all the Troll kingdoms, Queen Poppy and her friends try different ways to save all the Trolls.