When Luna gifts Twilight the town of Ponyville and its surrounding countryside as her demesne she's initially confused. Then, after double checking her dictionary, more than a little concerned.
When Twilight reveals that using the Elements has left her and her friends incapable of bearing foals, each of them must learn to adapt to this heartbreaking reality.
Mystery. Love. Magic. Murder. Truth. These are all important elements in the murder mystery Fluttershy has written, and is now asking Twilight to read. But she struggles to solve the mystery in which it turns out she's the protagonist.