From a sunken ship named Dukatenesel, Donald obtains a golden plaque commemorating the founding of an Augsburgian Welser consortium in New Granada on February 21, 1539.

Eager to find out what Scrooge is up to, Glomgold catches the first plane from South Africa to Germany and arrives in Nuremberg to spy on the ducks.

The boys' Junior Woodchucks Guidebook tells them that the documents confirming the ownership of Eldorado were given to a monastery in Bogota, Colombia, so the Ducks decide that they should head there next.

Fortunately, Donald is soon rescued and the contract is now in Scrooge's hands, so the Ducks have time to study it in peace and are able to find the lost location of Eldorado.

Glomgold follows them and, to sabotage their journey, drops a large boulder behind their truck, which starts to roll, so Donald has to drive incredibly fast to escape it.

Their truck snaps in half, but the bulldozer is intact, so Scrooge digs the ground and drains the entire lake but finds nothing but stinky mud.

Scrooge sells the bank back to Glomgold at the last moment before the rock face collapses, revealing untold riches hidden beneath the bottom of the forest the boys had found.