The entrapment of his sister's spirit has caused Jack Frost to forget what it means to play; thus causing bitterly cold winters. Santa Claus, Mother Nature, and Father Time conspire to show Jack the meaning of winter once more. To accomplish this they turn him, and by extension themselves, into children. Will learning to play again bring Noelle Frost back? Will Jack remember his sister's spirit or will winter become frigid and inhospitable for the rest of time?