In this sequel to the 2013 hit movie Frozen, when Elsa hears a voice singing a haunting tune, she remembers back to when she and her sister Anna were small, and their father told them a story of an enchanted forest, which was home to the Northuldra tribe. Unable to get the voice out of her head, Elsa goes on a dangerous journey north to Ahtohallan to find out what happened in the past between the tribe and her people, as well as to find out the truth behind her powers.
Although Elsa feels the journey is too dangerous for anyone else, Anna insists on going with her. Olaf the snowman happily joins them, as does Sven the reindeer and a lovesick Kristoff , who's trying to find the right moment to propose to Anna. However, the sisters and friends become separated in the dangerous forest and have to find their way back to each other, while uncovering the past and righting past wrongs.