Donald Duck reluctantly leaves his nephews, Huey, Dewey and Louie, with his estranged uncle Scrooge McDuck while he goes to a job interview. After Scrooge locks the boys in a room for making fun of him, they come across Webby Vanderquack and her sisters May and June, who befriend them and show off a collection of relics and artifacts that Scrooge and Donald collected during their previous adventures, only to accidentally release various ancient evils housed in them. After the kids help him contain them, Scrooge finds his thirst for adventure rekindled and decides to take them all, along with his driver and pilot Launchpad McQuack, to find the lost treasure of the Inca.
