Géza Mézga calls a chimney sweep, but Paula protests, and when everything is covered in soot, she packs up and goes home to her mother. Cleaning the apartment falls to Géza, but it is not an easy task. He has to ask Öcsi for help again. However, the settler hyperrobot that arrives by light mail only understands New Hungarian, so he has problems operating it. Géza, insatiable, turns to Öcsi again, and receives an even more modern experimental model in return, the robot director.