The Girl He Never Forgot

We all know the amazing story of Jack Frost saving all the kids from Pitch Black. But let's travel back in time, to when Jack was first turned into Jack Frost. Soon after Jack becomes Jack Frost, he finds himself almost stuck in his homeland, Arendelle. Years goes by and he has gotten used to his powers, and watching over his baby sister who is not a baby anymore. There is news from the kingdom of the baby princess Elsa dying. After Jack magically saves her, she becomes the only person to see him. Saving her, she possesses his same powers, he sees it in his responsibility to help her control them.