Two years ago Dr. Lorenzo Faust, a renowned American physicist, discovered a way to travel to alternate dimensions and stumbled upon the land of Equestria during his research. Within the span of a year two facilities were constructed - one on Earth and one in Equestria - to establish a bridge between the two worlds and allow the inhabitants to cross over into each others lands. Princess Twilight Sparkle is charged by Princess Celestia to serve as the Equestrian ambassador as well as judicial liaison on Earth. She asks her friends to come with her to help accomplish their greatest task: to save Planet Earth, starting with the American people. But can a world plagued with millions of sick and distressed animals, savage new weather patterns, and severe shortages of clothing, food and happiness be saved by six ponies?