Donald Duck reluctantly takes his nephews Huey, Dewey and Louie to the home of their reclusive great-uncle Scrooge McDuck; enthralled by the wonder of McDuck Manor, the triplets and their newfound friend Webby learn of long-kept family secrets.
The kids have a run with the Beagle Boys.
Louie races to get Scrooge's number one dime back.
After crashing Ma Beagle's birthday party, Webby and her new mysterious friend, Lena, must fight their way through Beagle Boy turf to get back home.
Huey and Webby's disagreement over the existence of a mythic species leads the children to explore an eerie abandoned subway tunnel; Mrs. Beakley grows suspicious of Lena.
Donald competes with his cousin Gladstone Gander to impress Louie at a mysterious resort in Macaw; Scrooge tries to lure the kids away from the resort's endless distractions.
Huey competes with Dewey for a coveted internship with Duckburg's newest tech billionaire, Mark Beaks; Scrooge and Glomgold team up to take this new competitor down.
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.
Scrooge and Huey are determined to be the first to set foot atop an impossible summit, but the snow-capped mountain holds a treacherous secret that tests both their will power and survival skills.
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.
Brilliant young scientist Fenton Crackshell-Cabrera is recruited by Launchpad, who feels menaced by tech genius Mark Beaks' newest invention.
Dewey and Webby fall into a death trap.
When Scrooge unexpectedly disappears during his birthday celebration, Huey, Dewey and Louie find themselves hosting a mystery party where everyone is a suspect.
The kids and Launchpad work together to capture a mystical money shark, while Scrooge attempts to better his public image with a televised interview.
Launchpad attempts to crash everything.
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.
Webby learns how Scrooge and Mrs. Beakley first met while she helps Scrooge rescue her granny from the clutches of rival spy Black Heron.
As Fenton figures out how to be a hero, Mark Beaks offers to hire Gizmoduck and help him defend all of Duckburg.
Feeling ignored, Dewey finds a new family: a band of singing and dancing pirates looking to rob Scrooge blind.
On a family trip to Scrooge's ancestral castle, Dewey tries to hide the truth about his mother as his brothers search for family secrets.
Stuck on a precarious peak, the kids secretly search the plane for the final clue about Della's mysterious disappearance.
With Magica De Spell close to exacting revenge on Scrooge, the family races against time to plan a dangerous rescue mission to save Scrooge and the city.