Before Twilight and her friends left on another adventure, she assigned a substitute teacher to cover her class on history. The students expected a pushover substitute but that's not who walked through the classroom door.
This is the story of the efforts of a group of stranded Humans to find equilibrium, balance, and a promise of tomorrow in a world seemingly out to get them.
Celestia has had it rough, raising both the Sun and Moon all by herself. She has had no choice given her sister Luna's recent banishment. Not to mention the emotional stress. Perhaps she has taxed herself a bit too much...