When Kremlin, the head of a foreign cleaning crew, steps out into the street after work is done in a high-rise building, a dead person is lying at his feet: his African cleaning man Koffi. Kremlin eliminates the dead man who worked for him illegally. In his closed hand he finds the gold membership pin of a golf club. Kremlin knows who the killer is and starts blackmailing him. When Koffi's body is found in a green space, Ritter and Stark dive ina foreign culture of the African community in Berlin. Freda Amadou, the dead man's beautiful and pregnant friend, is silent. Does she want to protect the only key witness in the murder case, the African student Taribo? And what does black businessman Willy Amadou have to do with the case? Only gradually do the inspectors discover that this is a dramatic father-daughter story in a literally dark milieu.