Everypony has always thought of Diamond Tiara as a bully, that pony who loves to see others suffer. A monster. If only they knew her, the real Diamond Tiara, behind the facade she always puts on. But it's hard to show her true self when nopony's willing to give her a second chance.

Twilight's been a princess for a few years now, finding that while her friends have been aging, she has not. When faced with this, her sadness and anger are taken advantage of by an old "friend" of Celestia's... one she had hoped never to see again.