Prince Shining Armor and Princess of Love Cadance, emperor and empress of the Crystal Empire , decide to plan a secret Santa activity where they go and deliver presents to all the good fillies and colts in the empire. But after delivering the gifts to their adopted child Thorax and their baby Flurry Heart, things take an interesting turn when one of Flurry's stray magic blasts turn her parents into gigantic titans. A now giant Shining Armor sees this as an opportunity to take their operation global. Why spread holiday cheer to their empire when they can do it to the whole world? Join these wonderful royal parents as they spend Hearth's Warming Eve spreading their goodwill and love to all the ponies of the Equestria and beyond!