Twilight Sparkle goes to Ponyville to prepare for the Summer Sun Celebration. There, she meets a wide variety of ponies: A hyperactive mare who picks apples for a living, a pompous unicorn who focuses more on controlling the weather than anything else, a hardworking seamstress, a loud and brass veterinarian, and a strange but surprisingly social pegasus party pony. But a dark mare ruins the whole party. Can she save the day with these ponies?