When Princess Ellie finds a one-hundred-year-old treasure map, she and her best friends, Kate and Prince John, hurry to saddle up and go exploring, but the palace grounds have changed a lot since the map was drawn.
Princess Ellie is very excited about the upcoming television broadcast of the annual Royal Jamboree, but when the present she ordered for her best friend, Kate, arrives with a mistake, Ellie is worried that the Royal Jamboree will be ruined.
Princess Ellie loves being in the royal stable more than she likes living in the palace, but when Meg, the palace groom, gets sick, Ellie learns that taking care of the ponies is more difficult than it looks.