Three little ducklings arrive in Fosterland, but one is not like the others! Though Billie looks like Marlie and Charlie, he isn’t a domesticated duck—he’s a white mallard. Billie likes being in Fosterland with his friends, but he longs to eat sky raisins (also known as flies) and be free. With one webbed foot in each world, he has to choose where his heart lies.