Beware her frozen heart

It was the year 1702, Elsa sits up in her room without a friend in the world. She peers out her window and sees a brown haired boy about her age. She sneaks out to take a walk one day and crosses path with the boy. They become best friends but one day a tragedy happens leaving her friendless hundreds of years later the boy become a guardian and reunites with his childhood bestfriend what will happen?..