Gods of the Plague (1970)

Franz Walsch, a small-time hood, is released from jail and searches for his old acquaintances. He finds his girlfriend Johanna and visits his mother with his brother Marian. Women are attracted to Franz, though he is a man of few words and remains emotionless throughout his encounters with them. Johanna becomes jealous when Franz goes off with his new lover Margarethe, and the pair connect with his old buddy Günther, known as the Gorilla. After Marian is murdered, a detective searching for the Gorilla and Franz pressures Johanna into divulging what she knows about them.