When Donald Duck joins the Navy, he decides to send his nephews, Hewey, Dewey and Louie, to live with his Uncle Scrooge McDuck. However, while the old billionaire agrees to take them in, he coldly wants them to stay out of his way and business. That changes when the boys discover a model ship that bears a map to a fabulous treasure. That sparks Scrooge's interest as he undertakes a hunt for that treasure and with his nephews, his pilot and newly hired governess and daughter, he discovers not only the treasure, but something more valuable than that.