Following the Friendship Games, with two schools now knowing about the existence of magic, Sunset Shimmer decides something needs to be done. That something happens to be opening a tourist agency for visits to Equestria.
In light of what happened during the Friendship Games, Dean Cadence and Shining Armor does something that catches Principal Cinch off-guard: They quit.
Twilight Sparkle has made a number of homemade clones to act as her while out with her friends. If only she weren't so absolutely terrible at making clones.
Rainbow Dash isn't your ordinary pegasus. She has a secret ability that ponies thought only unicorns and alicorns could posses. Magic! Not magic like Twilight's though, Rainbow's is stronger. And dark magic.