Hearth's Warming Eve, a time for families to spend time together and show the love that they have for each other. On her way home, Rarity found a cute little doll in the streets of Ponyville. She uses it as her gift for her little sister Sweetie Belle. However, after getting her present a bizarre string of murders have been happening around the once peaceful town. Sweetie Belle's doll will protect her, after all they are friends till the end, aren't they?