The famous film comedy about the principle housing officer and the infamous fate of the last Czech water sprite. There were only seven left. Mr. Wassermann with his wife and daughter Polly and their serving, Charles, Bertík and Alois with his daughter Jana. However, their end, however, seems inevitable, especially after Lojzík is assigned a new dry apartment of the first category with central heating and information that their damp house on the banks of the Vltava will be demolished. This will decide to prevent waterists at all costs and go to the housing officer Dr. Mráček, who is in charge of their case ...