What is the exposition of movie frozen?

In the kingdom of Arendelle, two young sisters, Elsa and Anna, are living happily in the magical ice palace created by Elsa. Elsa loves using her powers to bring joy to Anna, and Anna loves playing games with Elsa. One day, Elsa accidentally uses her powers to hurt Anna, and their parents decide to separate them to keep Anna safe. Elsa is sent to live in isolation, and Anna's memories of Elsa are erased.

Years later, Anna is determined to find Elsa and break the spell that has separated them. She sets off on a journey with the help of Kristoff, a mountain man, and Sven, his reindeer. Along the way, they meet Olaf, a talking snowman who helps them in their quest.