When Princess Elsa and Princess Anna of Arendelle were little girls, they were the best friends. Anna was one of the only people who knew Elsa's secret, Elsa had the power to make snow and ice! One night, Elsa filled an empty ballroom with snow so the sisters could play together.

As they played, Elsa lost control and she accidentally hit Anna with a blast of icy magic. Anna was badly hurt. Her parents went to the ancient mountains trolls for help. A wise old troll told them that Anna could be saved- she was lucky to have been hit in the head and not in the heart. As the years passed by, Anna forgot about that night. Years later, it was time for Elsa to become the queen of Arendelle. For just that day, the castle gates were opened. Hundreds of people attended the coronation ceremony. Elsa worked hard to hide her feelings and powers.

At the party, Anna danced with handsome prince Hans from the Southern lsles. He made her heart flutter. It seemed like they had everything in common, so they decided to get married. Elsa thought their engagement was a bad idea. Anna couldn't believe it and started arguing. Elsa started to lose control and as she shouted, ice shot from her hands. Everyone started at Elsa in shock. Now all the Arendelle knew Elsa's secret. she panicked and fled for the mountains. 

Anna felt horrible. Elsa's powers had created a terrible winter storm in the middle of summer. She left Hans in charge of the kingdom and raced after Elsa. As Anna rode though the fierce wind, her horse threw her into the snow and ran off back to Arendelle. Luckily, she met an ice harvester named Kristoff and his reindeer, Sven. Together discovered a beautiful winter wonderland. They met an enchanted snowman named Olaf. Olaf knew where Elsa was and wanted to help them bring back summer.