Princess Madison Gisoni of Great Britain is a popular and well-loved person. When she travels to America for track season, she meets her twin, Maddie Ziegler, who is a typical American girl. They decide to switch lives for a day, since Madison wants to be a typical American girl and Maddie wants to study the royal family. What happens when Maddie is sent back to England and Madison is stuck in America? Will they ever switch back?