Two royal penguins travel to the North Pole to prove the existence of Santa Claus in IN SEARCH OF SANTA. When a sleigh bell falls out of the clear blue sky, a penguin princess named Crystal (the voice of Hilary Duff) thinks it has descended from Santa's sled. She and her little sister Lucinda (Hilary Duff's real life sister, Haylie Duff) embark on a journey to the North Pole. As it turns out, their journey takes puts them onto path of wild animals, pirates, and rebellious penguins who hope to usurp their family's throne.