Twilight Sparkle didn’t care about overseeing the Summer Sun Celebration in some podunk little town. She just wanted a chance to study the history of the Lunar Rebellions and maybe, just maybe, convince Celestia that her sister’s return was a real possibility. Now it’s a lot more than just a possibility, and one Canterlot egghead isn’t going to be able to take on Nightmare Moon and her army alone.

(Season 1, Episodes 1 and 2 of My Little Pony: Friendship is Magic rewritten and expanded as a mature fantasy adventure)

As the details surrounding the Canterlot Invasion don't add up, Twilight investigates the suspicious disappearance of a guard during the attack.