It is the most spectacular criminal case of the post-war era: the murder of the Frankfurt noblewoman Rosemarie Nitribitt moves the still young Federal Republic in the years of the economic miracle. However, the story from Frankfurt's red-light district quickly mutates into a full-blown moral scandal in the stuffy Germany of the 1950s. And the police, who come under increasing pressure, make one blunder after another. The case turns into a farce and a murderer is never found. Can a fresh look at the old files solve this mysterious cold case today?