The government recently revealed the existence of peaceful, alien life from a planet known as "Equestria". The natives, which are colorful, talking ponies, have reached a peace treaty with Earth. Princess Celestia, the ruler of Equestria, and the nations of Earth have made the mutual agreement to send ponies to Earth and humans to Equestria to keep relations peaceful and learn about one another's culture.

Enter the Wallace family. They were just your average, slightly wealthy family of five, who just wanted to enjoy life. One way they do that is by taking in a foreign exchange student each year for the learning experience it provides both the family and the student. But they start to wonder why they were told nothing other than that the student is a very nice girl who wants her identity to be a surprise. The only thing left to do is wait for her to arrive.