After Twilight returns from the "Humble and Penitent Trixie's Equestrian Apology Tour" with Trixie and Starlight, she apologizes to Celestia for all that had happened. Then, Spike rushes into the room to inform them that something very strange has happened: A mysterious entity has just left a bizarre message in the library. Now, it is up to the five of them to decipher the message, along with who could have left it.

(Also featuring Princess Luna)