One year after the events of the second story, Elsa and Julie start hearing voices that are calling them from beyond their pasts. Elsa's voice is unfamiliar to her while Julie's might be someone she knows that hasn't yet left her side. with the help of their sister and their group of trusted friends, they go on a journey to find out what the voices are calling them and what they mean for the future of them and the people of Arendelle.