The birthday of twin boys, Mökö and Luru, takes the family Kiljunen to Helsinki, where their dog gets accidentally switched with the president's dog. Mökö and Luru rush to save their dog, while mother and father Kiljunen take over the city from land, sea and air.

A farmer's wife is seduced into running away from her stolid older husband by a city slicker, who enslaves her in a brothel.