Peter Herzl, social worker and Left sympathizer from Wuppertal is, assaulted and robbed on the way back from Yugoslavia to Germany. Due to some misunderstandings the police examined him as a suspected terrorist. In Vienna, he finds shelter with the prostitute Kathi. She has an incestuous relationship with her adolescent daughter. Fascinated she watched her mother and Peter during lovemaking. Soon they would also participate in the game. Meanwhile the search for Peter is at full speed. And Kathi's pimp sees an opportunity to get easy money by betrayal.