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.
When a filly version of herself appears in the middle of the library, Twilight must figure out what happened, what it means, but most importantly, give comfort to the last person she thought she could. Herself.