Diamond Tiara runs away from home without her tiara, and moves into Carousel Boutique, much to Rarity and Sweetie Belle's surprise. Later, when Diamond is kidnapped by the diamond dogs, an unexpected pony comes to her rescue.
Button Mash asks Sweeite Belle to a Winter Ball Dance at Canterlot, problem is he doesn't have the tickets. Meanwhile, Sweeite Belle learns a secert that has been kept hidden from her for years.
It's Sweetie Belle's first day at Equestria's newest academy, and she plans on making it the best year ever. However enemies old and new emerge, while Sweetie struggles with the fear that her old friends are pulling away from her.