She has been working so hard, her fiancé Kristoff suggests she take a night off to visit her sister Elsa, the Snow Queen. Anna loves the idea. Accompanied by Kristoff, Sven, and Olaf, Anna reunites with Elsa in the Enchanted Forest. Who else is responsible for the sudden onset of storms and the earlier than normal darkening of the skies? Why else is everyone starting to become so forgetful? Together they recall Kristoff’s terrifying tale about a princess who turned into a draugr—an undead creature that steals memories in an effort to make others forget the misdeeds it committed when it was alive. Is it possible that Kristoff inadvertently unearthed memories of a draugr, and thus unleashed the monster upon Arendelle? Anna and Elsa must uncover the real story behind the tale before everyone in Arendelle forgets who they are and is cast into darkness forever….