A theif named Sharkey whilst passing Banana Island in his submarine, robs the islanders of their pearl. He heads to Duckburg where he sells the pearl to Scrooge, Scrooge knowing of the pearls true powers agrees to a large price. Sharkey soon finds out the pearl he had just sold is magical and gives its owner great wisdom. Scrooge puts the Pearl in his cabinet and sets off to seek advice on getting to Banana Island. Meanwhile, Webby so is looking for a marble so she can enter the Duckburg mable shootouts, she sees the pearl and thinking it is a marble, takes it and heads to Duckburg park. Sharkey noticing Webby has the pearl, follows her to the park. Scrooge returns home to notice the pearl is missing and a marble has been put in its place. Just as Scrooge arrives at the park Webby is making her shot, but it isn't a good one, and the pearl ends up in the hands of Sharkey once again. They race to Duckburg habour, were they then race to Banana Island, They reach Banana Island. Scrooge and Sharkey fight for the pearl, but the power of the pearl kicks in, and Scrooge and Sharkey see sense, although Scrooge finds times to make a deal with the islanders to import their unwanted bananas into Duckburg!