Dear Princess Celestia, I'm sorry I haven't written in a while. Things seem to be falling through the cracks lately. Spike thinks I should go see the doctor, but...
Rainbow Dash finds a maimed, unconscious young colt on the edge of Ponyville and rushes him to the hospital, but nopony knows who he is and something about him seems off...
Chrysalis and Cadance have been engaged in a battle of wills against each other for longer than either can remember, but little do they know they're both fighting for the same reasons.
After Celestia humiliates her at a dinner, Luna storms off and ends up snooping around in her sister's room. There, she stumbles upon the journal Celestia kept immediately after the banishment of Nightmare Moon.
Princess Celestia has been keeping a dark secret from her subjects for a very long time. It's not an easy truth to tell, but if anyone can accept her after learning it, it will surely be her most faithful student.