Famous film comedy about a principled housing officer and the infamous fate of the last Czech watermen. There are only seven left. Mr. Wassermann with his wife and daughter Polly and their servants, Karel, Bertík and Alois with their daughter Jana. However, their end also seems inevitable, especially after Lojzík is given a new dry category I apartment with central heating for his dedication and information that their damp house on the bank of the Vltava will be demolished. The watermen decide to prevent this at all costs and go to the housing officer Dr. Mráček, who is in charge of their case...