Four years after Elsa became queen, Arendelle has settled down and things have become pretty quiet. A new alliance here, a business trip there, but never anything too hectic. Until now. A dark wizard is after Elsa's powers, but when Anna accidentally discovers powers of her own, and the sisters find out that they have another sister named Rachel (younger than Elsa, older than Anna) with fire powers, Arendelle is put into even greater danger as the wizard's greed grows. Can Elsa and Anna find their sister, defeat the evil wizard, and save Arendelle before it's too late? Or will Arendelle fall to the wizard's ambitious plans? "Every cloud has a silver lining."