Four years ago, Nightmare Moon returned from her imprisonment in the moon and swiftly overthrew her sister, banishing her within the moon in her place. Since then, Empress Nightmare Moon has ruled over the land with an iron hoof under the blanket of night, crushing all resistance before her.

As her head maid, Rarity has served the Empress loyally for the last three years, along with raising her sister after their parent's disappearance. The thought of doing anything to harm the Empress seemed absurd to her.

Unless she has no choice but to. But even with Sweetie Belle's life in danger, can she bring herself to do it? And what consequences will occur because of it?

Set in the Nightmare Moon Timeline from The Cutie Re-mark