Any bloody death will lead Inspectors ?etin Ikmen and Mehmet S?leyman out onto the dark streets of Istanbul. On 21 January, a half-decapitated corpse in the poor multicultural district of Tarlabasi poses a particularly frustrating and gruesome mystery. But as the months pass and the violence increases, it turns into a hunt for that rare phenomenon in the golden city on the Bosphorus: a serial killer.