Ironically, the body of a Lübeck bus operator is found in a parked car in front of Nora's house. Did the perpetrator want to deliver a message to her? Together with Commissioner Simon Brandt from the homicide squad, she investigates the area surrounding the murder victim Thorsten Jensen. A young Turkish employee of the murdered man, Murat Kaymaz, has been on the run since the night of the crime and is threatening to flee abroad. But the former bus driver Niels Franke is also increasingly being targeted by the investigators. Finally, Nora found evidence that Thorsten Jensen and Murat Kaymaz had more in common than a professional relationship and that Jensen was involved in illegal activities with his bus travel company. The case appears to be much larger than first thought.
In the end, Simon and Nora need the help of Nora's boss, Jan Geissler, with whom Nora repeatedly has arguments and with whom she shares a secret passion.