The Duisburg fire department is alerted: A fire has broken out in an apartment building with heavy smoke in the stairwell. People are calling for help. The tension mounts with every second. The situation worsens on site: Just moments ago, a person was seen at the window above the burning apartment, but now they have vanished. Did they flee in panic into the toxic smoke of the stairwell? A team wearing breathing apparatus immediately enters the building to rescue the person, while a second team fights the fire. Meanwhile, a serious accident has occurred on the highway, involving several vehicles. The situation is initially chaotic. Firefighters assess the scene and make a disturbing discovery: The occupants of one of the cars have disappeared without a trace. Have they fled, or are they lying injured in the vicinity of the accident?