When the kingdom of Arendelle becomes trapped in a perpetual winter, fearless Anna joins forces with mountaineer Kristoff and his reindeer sidekick to find Anna's sister -- the Snow Queen Elsa, and break her icy spell. Although their epic journey leads them to encounters with mystical trolls, a comedic snowman, harsh conditions, and magic at every turn, Anna and Kristoff bravely push onward in a race to unite the sisters and save Arendelle from winter's cold grip.