Fearless optimist Anna sets off on an epic journey—teaming up with rugged mountain man Kristoff and his loyal reindeer Sven—to find her sister Elsa, whose icy powers have trapped the kingdom of Arendelle in eternal winter. Encountering Everest-like conditions, mystical trolls and a hilarious snowman named Olaf, Anna and Kristoff battle the elements in a race to save the kingdom.