Donald's slacker cousin Mel Mallard invites him and the kids to his shabby house in Hawaii. He takes Donald fishing while Huey takes over Mel's P.I. business for a day. A missing pencil leads him to a villainess and her superweapon.
Daisy interviews egotistical car racing champ, the Rocket. He hits on her, so jealous Donald decides to race against him. The nephews even get him some of Von Drake's potent rocket fuel, but things don't go as planned.
In order to justify being late for work again, Donald comes up with an epic tale of heroism that includes mail delivery, outsmarting a dinosaur and even an alien invasion. And it all happened to him that very morning.
The nephews use Ludwig Von Drake's earthquake machine to convince Donald to finance their contingency plan in case of a quake that just happens to include a top notch clubhouse. Donald realizes he's been had and plans revenge.
Von Drake's Superhero Machine turns Dewey into supersmart, psychokinetic Brainboy, Louie into superstrong Captain Muscle and Huey into the "Really Incredibly Fast Guy". But Donald is turned by mistake into supervillain, the Duck of Doom.
Donald's been discharged from the navy a day too early, so he returns to serve out one more day on an aircraft carrier. When his dogfighting video game takes over the ship and starts war games, only Donald's gaming skills can stop it.
The nephews prank Donald by giving him a strange potion that turns him into his original 1934 version from The Wise Little Hen short. He pranks the kids back and even steals their dates. However, he can't stop aging backwards.
Donald becomes insanely jealous and starts seeing rivals in anyone Daisy comes in contact with including his own nephews. He becomes convinced that in order to win her love back, he must win a snow race.
Donald, Daisy and the kids are in a museum in China to do a report on the famous statues of Terracotta Army. Huey falls for a mystical local girl, Soo Ling, who works in the museum and is not what she seems.
Donald and the kids end up in a haunted mansion instead of the house where a Halloween party is being held. Dewey pulls several ghost pranks scaring everyone, but when the real monsters show up, he becomes the boy who cried wolf.