A traitorous spy. An amoral archaeologist. A cloudheaded Wonderbolt. A secretary in way over her head. Leading them into the changeling hive is Princess Luna. There will be no going back. And none of them are prepared for what they'll find there.

Twilight is being pestered by time-traveling clones of herself, all of whom are entirely too interested in her. It's up to Rarity to figure this out. Or try, anyways.

Nightmare Moon won a thousand years ago, plunging Equestria into perpetual night. Now, as Princess Luna's student, Twilight Sparkle must contend with Celestia's unexpected return as a familiar group of ponies are thrown into conflict.

Applejack goes to the dentist. She's not even a little bit happy about this.

Derpy Hooves is still trying to figure out just what happened to Pinkie Pie after the mess with the duplicates, because she wants to meet a friend. But when that friend is somewhere inside Pinkie's head, things are going to get complicated.

Everything in the universe is going to die, or so Twilight says. That's just not good enough for Pinkie Pie.

When one of the duplicates, not Pinkie Pie, passes the test and remains in Ponyville, she's forced to lie to everyone. Well, almost everyone.