When a real live princess comes to town, Bingo can't wait to meet her. But Bingo gets to do more than just meet her -- when Bingo and the princess realized that they look almost exactly alike, they make a plan to trade places! Bingo initially takes to life at the castle, but she soon misses her family, and realizes that being isn't all it's cracked up to be. When the royal family cuts their visit short and decides to head home, can the girls swap back before it's too late?