It's Twilight and Moonlight's first Hearth's Warming Eve together, and Twilight wants it to be special, so to celebrate, they're hosting a party at the Castle of Friendship. Not just that, but Tempest is still trying to get back into the swing of the festivities. However, things begin to go awry when everypony is snowed in at the castle and tempers begin to flare. It's going to take a miracle to get everypony through the night.

Takes place after The Rise of Warfang, the movie, and Forgive and Forget.