A young girl named Brandy discovers a pink castle near her home and finds that a princess named Elizabeth lives there. Brandy writes Elizabeth a letter and is invited to a tea party at the castle. At the party, Brandy wears a fancy dress and meets Elizabeth and the queen. Elizabeth and Brandy become friends and Elizabeth suggests that Brandy could become the next princess. A few weeks later, Brandy and her parents move into the castle to live with Elizabeth's family, so that now there are two princesses, Elizabeth and Brandy, living in Greenville, PA.