Åsa-Nisse is visited by a distant relative, the millionaire William Wilhelmsson, who wants to experience the simple life in the countryside. Åsa-Nisse and Klabbarparn decide to play a prank on him by pretending that Knohult is a modern city with a luxury hotel. They go to great lengths to keep up the charade, even enlisting the help of the whole village. However, things start to unravel when William's daughter falls in love with Klabbarparn and the truth about Knohult is revealed. Will Åsa-Nisse be able to salvage the situation and keep William from leaving in disappointment?