Subterra

Wrocław in 1946 is the world after the apocalypse. Everyone seems to be tainted by evil. And yet, in Popielski's poor apartment, someone special appears. Professor Stefanus, a man who absolutely believes in human evolution towards good. He comes to Popielski with a job offer. The detective is to discover who, among the students of Stefanus's secret philosophy course, is the informer. Circumstantial evidence indicates that one of the three girls is a spy.