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.
After foiling the Beagle Boys, Scrooge and his nephews decipher the strange marking on the map, which leads to a sunken treasure ship in Ronguay. However, Flintheart Glomgold and El Capitán are out to stop them at every turn.
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.
The nephews, Webby, and Mrs. Beakley find themselves joining Scrooge in his adventure as he looks for the second half of the treasure map in Antarctica.
Gyro's props for a science fiction television show accidentally launch the cast into space, and Launchpad becomes the hero when it is realized that he is the only real pilot on board.
After the incident with Armstrong, Gyro builds giant human-operated robots for Glomgold, only to have them be stolen and operated by Ma Beagle and the Beagle Boys.
When going to Virginia for a Civil War reenactment, Launchpad encounters aged Confederate veterans who once served under his ancestor, who had lost a battle. Meanwhile, Doofus and the nephews learn that a businessman is exploiting the reenactments for financial gain. Launchpad works to avenge his family's honor by rallying the old veterans to a "rematch" of sorts against the reenactors.
Scrooge and Glomgold compete in a contest where the winner, being the world's richest duck, becomes the sales broker for a new fruit from Macaroon that works like a flashlight. First, though, Scrooge must keep his fortune away from the Beagle Boys.
Scrooge acquires a magical harp that can determine if someone was lying or not. However, Magica de Spell wants the harp for herself, and so does the harp's guardian.
Scrooge and the boys take a trip to visit an old friend of his, Count Roy. However, unknown to Scrooge, Roy's evil twin Ray rules Roy's kingdom with an iron fist.
Scrooge becomes a victim of a potion that causes him to be obsessive with giving money away. It is up to his nephews to find an antidote before he stays a big spender forever.
Donald makes up a story about being a hero to the nephews. They stow away in the Navy and try to make him a hero. Meanwhile, The Phantom Blot has a spy infiltrating the Navy while he has Scrooge McDuck and Launchpad McQuack as prisoners on Cat Island after they go to investigate Scrooge's fishing fleet there.
