Matka Joanna od Aniolów plot
The 17th century: A monastery in a small town. There is talk of an occupation by the devil of the Mother Superior. The local priest responsible for this has already been burned at the stake for sexually seducing the nuns. A high-ranking priest arrives. His first encounter with Mother Superior Joanne of the Angels, who is possessed, leads to a horror. She is possessed by Satan - she yells, scolds and insults the priest. Later, she asks him to save her so she can become a saint. To do this, he has to kill two innocent people. He thus becomes a prey of the devil...