On 1 November 1957, 24-year-old luxury call girl Rosemarie Nitribitt was found dead in a flat in Frankfurt's Stiftstraße. Her services were popular among male guests of the noble hotels and the moneyed aristocracy. Nitribitt's death hit like a bomb in the middle of the economic miracle of the 1950s, yet her murderer was never found. Cold Case reopens the case.