Young seminary student Franziskus (Benjamin Besson) has been ceremonially ordained. He wants to escape the harshness and injustice of the world and devote himself to the service of God in the quiet seclusion of a monastery. He is also hoping to forget the beautiful lady Aurelie (Jaroslava Schallerová), whose life he saved in a flooded brook and with whom he spent an amorous night. He knows that her father would never allow her to marry him. But the devil dressed in a monk's habit and under the name Viktorin (Andrzej Kopiczynski) intervenes in Franziskus's destiny and attempts to lead him astray. To do so he first uses the diabolical elixirs kept at the monastery as a rare relic. When the young monk gets expelled from the monastery, Viktorin prepares another trap with the help of Aurelie's stepmother Euphemie (Milena Dvorská).
The Prague Research Institute of Air Engineering is to prepare a proposal to reduce dust in Ostrava, especially in the area where the new power plant is to be built. That is why engineers Vojtěch Spára and Jiří Zástěra will travel to Ostrava. Eva Frágnerová, a hygienist, will strongly oppose the power plant project near the housing estate.
