In a magical kingdom of Arendelle, live two princesses, Elsa and Anna. Elsa, the elder sister, has the extraordinary ability to create snow and ice, but after accidentally harming Anna with her powers when they were children, she becomes reclusive to keep her sister safe. The girls lose their parents in a shipwreck, and Elsa's powers continue to grow and become harder to control. When her abilities are exposed during her coronation as queen, Elsa flees Arendelle in fear, inadvertently setting off an eternal winter that envelops the kingdom.

Desperate to bring back summer and repair their fractured relationship, Anna embarks on an arduous journey to find her sister. She teams up with a rugged ice harvester, Kristoff, his loyal reindeer Sven, and a comical, sentient snowman named Olaf. Together, they face the harsh conditions of the snowy terrain and battle the elements on their quest to locate the runaway queen and reverse the icy spell she has cast upon Arendelle.