A young woman finds herself in an unexpected situation that her studies in veterinary science cannot prepare her for—awakening in a strange world in the body of a creature named Nightmare Moon.
Rarity has been restless ever since the events of her time as Nightmare Rarity. At her wits' end, she contacts the only one who could possibly help, only to discover a shocking truth.
Long ago, Equestria was represented by the Court of the Royal Pony Sisters, a system comprised of land-ownding Lords and Ladies who represented the ponies in their regions and Equestria as a whole. However, the ponies are not without their flaws.
Can Nyx find acceptance with her extended family during Hearth's Warming, or will she find the holiday hymns are filled with nothing but hollow promises?