Princess Celestia's been dealing with some rather embrassing issues for so long, and she decides it's finally time to do something about it. Fortunately, she just so happens to have a sister and a student more than willing to lend a helping hoof.
She had had the dreams before, but this one was different. It was a warning, telling Celestia to do one this she wishes she would never have to do. Dig up the old memories.
Discord; once the ruler of Equestria. Fair, and Loyal. He had the love of the dear Celestia, and the friendship of kind Luna. What changed? What happened, to make this once loved creature...the most feared in all of Equestria...