Rarity is known around Ponyville for her confidence and class, both of which are lost when Trenderhoof, the world famous travel writer and apple of Rarity's eye, comes to town. So, when Trenderhoof's attention is drawn to Applejack, Rarity does the unexpected and begins to dress and act more like Applejack than herself, which ends up in a muddy mess.
"Get your muzzle out of those books and make some friends!" That's what Princess Celestia tells Twilight Sparkle. She may be the smartest unicorn in Equestria, but Twilight Sparkle gets an "incomplete" in friendship. There's more to life than learning magic, after all - so she goes to Ponyville on a mission to make friends. There she meets five special ponies who take her on exciting adventures and teach her the most powerful magic of all... the magic of friendship!