Wolfgang Kunert has been waiting for hours at the job center in Frankfurt. Finally his number is called. In the room of the employment agency Heidi Ganz, a heated argument ensues, at the end of which Kunert threatens Heidi Ganz with a pistol. A colleague who wants to help Heidi Ganz is shot by Kunert and bleeds to death because no one dares to go into the office. Kunert flees with Heidi Ganz as a hostage. Inspector Fritz Dellwo and his colleague Charlotte Sängersucceeds in locating Wolfgang Kunert via his mobile phone. When they arrive, all they find is Kunert's car and his cell phone. Kunert and his hostage have disappeared without a trace. Eight-year-old Ronja, who has just moved to Charlotte Sänger and Fritz Dellwo's street, has observed something that no one wants to believe. When the Kunert case stagnates, Charlotte takes care of this process and discovers a terrible secret...