When police officer Horst Schimanski came back late at night the young girl Katja is waiting for him. She came back from the privatschool and her mother did not stay at home. Next day the police found a dead woman not far from their home shot down. Has the old lover of her mother Henje something to do with the crime ? The soundtrack Das Mädchen auf der Treppe has been created by the german electronic band Tangerine Dream and has been their most popular track.
—Oliver Kramuschke