The legend of Nightmare Moon has never been lost to ponykind. The jealous younger sister, corrupted by her dark inner feelings turned on the elder sister, and as punishment she was banished to the moon. Nopony ever asked for anything more, nopony ever cared about the details. But the story, the legend, as it's become, is so very vague. What truly happened, a thousand years ago, when the Moon refused to give way to the Sun?