The Saarbrücken Detective Judith Mohn and her colleague Freddy Breyer investigated in the case of a dead prostitute whose body was found in a forested area on the Saarschleife. Everything points to murder. For the investigator duo, the milieu along the long-distance driver route Germany-France first comes into focus. When Judith Mohn suspects a connection with another, never-cleared case, she turns to former Commissioner Markus Zerner. This determined almost ten years ago in the case of 16-year-old Maria, who disappeared without a hitchhiker ...