Chrysalis’s second invasion was an incredible success—Equestria has fallen, and it seems like there isn’t anypony left to save it. But when Chrysalis stumbles across a mirror in Friendship Castle, it might not be ponies she has to worry about.
Princess Twilight Sparkle feels the need to get away from her royal duties for awhile. Her counterpart wants to see Equestria for herself. This whole plot seems rather familiar...