With the help of Duckburg's head librarian, Miss Bookbeak, Scrooge McDuck and his nephews Huey, Dewey, and Louie have found the location of the greatest treasure in the world on a long-forgotten map - and it turns out to be right in their own backyard! After spending days exploring every corner of Duckburg, from its prisons to its movie palaces, the quartet of eager entrepreneurs set off to claim their final prize at the spot marked 'X' - with Uncle Scrooge providing a history of the monument they're making for along the way!