A prostitute nicknamed Sevtap was found choked and gagged in a hotel room in the back streets of Beyoğlu. She had one hand cuffed to the bed and badly beaten before she was killed. There was not the slightest clue about her true identity. A second female body was found as the investigation continued, further complicating matters. Another prostitute, nicknamed Mimosa, was badly beaten and strangled, just like Sevtap. DNA belonging to the same man was found on both women. Are Superintendent Orhan and his deputy Selim facing a serial killer who kills prostitutes? And most importantly, will they be able to catch the murderer before he commits another murder?