Years after peace has settled in Arendelle, an unnatural earthquake shatters the land. A long-exiled elemental troll named Brawn, once banished by Grand Pabbie, has returned from the frozen north, seeking dominion over the three primal elements: Earth, Fire, and Ice. With corrupted elemental spirits at his side—including a fire dragon and a stone colossus named Gravrak—he threatens to plunge the world into chaos. To stop this elemental war, Elsa, Anna, Kristoff, Olaf, and Sven are joined by a courageous young halfling named Ash and his colossal, mysterious golem friend Grimblethorn, forged of wood, crystal, and stone.
