Dear Princess Celestia, I'm sorry I haven't written in a while. Things seem to be falling through the cracks lately. Spike thinks I should go see the doctor, but...
When one fateful search through the Everfree Forest leads Rarity to a secret library inhabited by the spirit of an ancient alicorn princess, she realises that it may be time to start believing in fairy tales.
As punishment for her crimes, the Elements have cursed Sunset Shimmer to do favors for anyone who asks. Lucky her. And then there's that other Twilight Sparkle she keeps running into...