A well written and illustrated book following the tale of two sisters. The princesses were very close. One has magical powers to turn everything to ice and one who doesn't. Following an accident Anna's memories of Elsa's powers are wiped and Elsa begins to loose control of her powers. Her parents encourage her to conceal her powers and the castle gates are shut. The girls, Elsa especially, are locked away and in hopes to protect Anna, Elsa refuses to maintain the strong relationship with Anna. On coronation day, Anna accidently upsets Elsa, after announcing to Elsa her intentions to marry Prince Hans, a stranger she had met that day. In the heat of the argument, Anna pulls off Elsa's glove and in an act to encourage Anna to silence, she shoots her Ice powers, revealing her powers to the people of Arendelle. She runs to the North mountain where her powers can be let loose, starting an eternal winter in Arendelle. Anna leaves prince Hans in charge and chases after her sister to get her to reverse the winter storm. Anna makes her way to a small shop up the mountains, where she meets Kristoff, a young man with a reindeer Sven. They agree to take her up the mountain to find her sister after she buys them supplies. The crew start their journey where they meet a little snowman called Olaf. He takes the group to Elsa's ice palace. Anna and Elsa come face to face again where they discuss the eternal winter. Elsa gets extremely upset that she hasn't kept everyone safe and accidently strikes Anna in the heart with her ice powers. Kristoff takes Anna to his magical friend trolls, who tell her she needs an act of true love to save her.
Hans eventually starts to get worried after the return of Anna's horse, and goes to look for her. He brings Queen Elsa home as a prisoner.
When he returns he finds Anna back at the palace, dying of a frozen heart, he goes to kiss her but...turns and puts out the fire keeping Anna warm. He never loved Anna and only wanted to be closer to running his own kingdom. Anna then realises that Kristoff is her true love and she is rescues by Olaf who attempts to reunite the pair. When Anna is close to greeting Kristoff, she realises Hans is about to hurt Elsa, so she runs infront of him and smashes the sword as she freezes over. Elsa hugs her sister and weeps, this act of true love helps to melt Anna and they all live happily ever after.