Based on a song by the same name. It was the Genre Popularizer for the Rillumarei film and live entertainment genre that drew from the musical couplet genre of light, cleverly written, often satirical songs. Many of these films were based on an existing song, or a song was specifically written to be the foundation of a film.
Pete and Runt set up a kindergarten at their home, and unknowingly end up taking care of a kidnapped baby.
At Justiina's insistence, Pekka and Pätkä are looking for work again and end up starting a detective agency. The first assignment takes the duo on a cruise on Lake Saimaa. Traveling on the same ship are representative Johannes Kulo and his daughter Maija, as well as the lumberjack Jussi, who gets caught up in the duo's misadventures.
