Slaughterhouse (1975)

Mohammad meets a woman Fakhri in a café and decides to go with her to the north. He invites his friend Saeed who about to get marry with his fiancée to come with them. But in the middle of the way Fakhri drops out of the car and with another guy Jalal plans to blackmail these two friends causing them to be jailed. This cause Saeed's fiancée to commit suicide. When released Saeed who blames Fakhri for the death of his fiancée decides to get revenge on them and asks Mohammad to help him.