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.
When Donald Duck decides to join the Navy, he leaves his nephews, Huey, Dewey and Louie, in the care of his cantankerous Uncle Scrooge. He is an eccentric and miserly billionare who loves to literally swim in his money that is held in his corporate headquarters/vault known as the Money Bin. While the initial meeting was less than pleasant, events soon have them, along with a newly hired nanny, her daughter and Scrooge's stupid but skilled pilot, on countless adventures as the group goes around the world looking for treasure, or defending Scrooge's current assets from enemies like the Beagle Boys or Magica De Spell.