One morning while raising the sun and lowering the moon, the princesses sense a disturbance that leaves them unsettled. On the same day, a traveler arrives in Ponyville.
Congratulations, Twilight. With the Princesses on vacation, you're in charge of Equestria. Perhaps it's a bit early to congratulate you. After all, whether it's a jealous nobility or an unhappy military, your reign will be anything but