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