Donald Duck reluctantly takes his nephews Huey, Dewey and Louie to the home of their reclusive great-uncle Scrooge McDuck. Enthralled by their once legendary great-uncle and the wonder of McDuck Manor, the triplets and their newfound fierce friend Webby learn of long-kept family secrets and unleash totems from Scrooge's epic past, sending the family on an adventure of a lifetime to the Lost City of Atlantis.

Os sobrinhos levam a Patrícia à Zona da Grande Diversão e têm um encontro perigoso com os Irmãos Metralha.

After crashing Ma Beagle's birthday party, Webby and new mysterious friend Lena must fight their way through Beagle Boy turf to get back home.

In a lost pyramid, Louie interprets a pharaoh's prophecy to his advantage, forcing Scrooge and Launchpad to convince a group of living mummies to rescue him.

Donald is dragged into a feud between Scrooge and Zeus, while Dewey and Webby search for an artifact that may provide the truth about Dewey’s mother.

When Dewey invents a holiday that allows the triplets to be only children for a day, each realizes they need their brothers more than they thought.