Uncle $crooge, Donald, and the nephews head to a plot of land north of Lake Superior that $crooge has recently purchased. The land is supposed to be inhabited only by moose and other ordinary wildlife. The ducks are surprised to find a tribe of pygmy Indians called the Peeweegahs. The Peeweegahs require them to prove their worthiness by fishing for the amazing King Sturgeon. During their adventure, Uncle $crooge finds lithium, selenium, thorium, and other "rare earths" including the fictitious oxide of strombolium. Note that $scrooge's qualitative analytical skills are so formidable that he identifies elements just by looking at them.