While Donald is flipping through some books in Scrooge McDuck 's library , a map falls out of a book relating to the treasure of King Garuzia , ruler of the Great Duck Kingdom in ancient times . The map leads to the location of the king 's most prized possession , hidden in a secret place shortly before his death . Donald thinks this is his path to riches . Unfortunately Big Bad Pete overhears and pursues Donald throughout the game hoping to steal the treasure .