Twilight Sparkle has been living a lie. Everypony told her what a beautiful and accomplished mare she was. Everypony thought she was a responsible adult. They were wrong. She was still just a filly trying to stumble her way through life.
Sunset Shimmer is Princess Celestia's beloved student, and her daughter in all but name. But sometimes getting too close just makes it easier to get hurt.
It's Twilight Sparkle's first night as a princess, and she can't sleep. Her thoughts are haunted by a question that will not let her rest. A question that only Celestia can answer.