[1] It was split into three parts that ran conjunctive to each other, who gets the last word on debt, chasing after a coin which culminates into a pie fight (at a place called the "Atlas Bakery", giving a cryptic hint of the main plot), then finally Scrooge and Donald's discovery, and subsequent escape from, Atlantis.
However, when the nephews remark that currency is no longer minted as Balonia became defunct after the First World War, Donald sells the nickel to a coin dealer for five American dollars.
Scrooge then takes a cargo plane and dumps all the quarters into the Atlantic Ocean, save for Donald's own, which is now appraised at the astronomical amount of ten skyrillion dollars.
The land subsidence was slow, and the men kept building the cities farther up mountains, topped with conelike air intakes, until everything was sunk.
However, they feign interest in living in Atlantis, which pleases the Professor to which he elects to release them on a guided tour of the city (but keeps Scrooge and Donald imprisoned, knowing they are not genuine).
The jukebox doesn't work, but the Professor summons an electric eel to power the appliance, and provides one of the 1916 quarters to pay for a song.
When a 1940s big band song starts playing, an excited Professor summons the entire population, and soon all Atlanteans are enjoying a dance party.
Upon reaching a shallow depth, the Atlanteans must give up, as they risk asphyxiation for their lungs have evolved as being unable to breathe the surface air.
But when he attempts to sell the ten skyrillion dollar quarter, the coin dealer replies that there is only one person in the world wealthy enough to afford such as astronomical sum: Scrooge himself.