Grogar sends Jet, a lizard spy known for using Shadow stones for cancelling magic, to steal the Star of Worlds, a star with the power to transport the user to any world, after Twilight is entrusted with it. When Jet steals it, Sweetie Belle tries to stop him, causing the star to take them to a human world that is not Canterlot High. While there, Sweetie Belle makes a new friend in Megan Williams, a local farm girl, who helps Sweetie Belle get home, and leads Megan on the adventure of a lifetime.