Frozen The Deep Freeze

3 years ago, the kingdom of Arendelle had suffered from an eternal blizzard caused by the fear of the snow queen Elsa. With the help of her friends and family, she saved her kingdom and ruled over it peacefully. But one day, the forest north of Arendelle had begun to freeze by an unknown man from an unknown location. Who is this person, and is he the same as Elsa?