Their relationship stronger than ever before, Rarity and Twilight finally face their biggest challenge: ending a story that started a thousand years ago.
As an ancient alicorn trapped inside a library, Princess Twilight spent many a century dreaming of being rescued from her prison. Now, finding herself in an entirely new Equestria, she realizes she'd never planned for somepony to actually succeed...
Rarity enjoyed the simple pleasures of life. Drinking tea, fighting timberwolves, picnics with Fluttershy, meeting dragons and, most of all, spending time with an ancient alicorn spirit. She wouldn't give it up for anything in the world.
Rarity liked the tale of The Four Princesses as a filly, even if she knew it wasn't real. Princesses fighting against a spirit of chaos? A library under a tree? Please. But then she grew up and found out some bedtimes stories were quite real.
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.