The introduction of the series, as Donald Duck joins the Navy and sends Huey, Dewey, and Louie off to live with their uncle Scrooge McDuck. Meanwhile, a mysterious man named El Capitán busts the Beagle Boys out of jail in order for them to help him steal an awkward treasure map in Scrooge's possession.

Upon finding out of the Valley of the Golden Suns, Scrooge begins an expedition to find the treasure therein, starting with finding the map that leads to it. First, he must get one half of the map from High Golden Sun Priest Joaquin Slowly.