Lena Priebusch and Eric Zeitschel are on duty on the Kiez when they come across an injured man in need of help. Was it an accident, a robbery, or a violent dispute? They must quickly determine what really happened. Meanwhile, Timo Marzahn and Malte Hübner from the traffic unit targeting illegal street racing are patrolling the city center. A very special car has caught their attention - but is the Mustang actually allowed to be driven on the streets of the Hanseatic city?