A naked teenage girl is found dead near the beautiful Byzantine Yoros Castle in Turkey. She has stabbed herself through the heart but there is evidence of bizarre sexual practice. In another part of Istanbul, a young boy seems to have committed suicide in similar circumstances. What dark rituals could have compelled them to fatal self-abuse? Inspectors Cetin Ikmen and Mehmet Suleyman follow an internet trail that leads them to an underworld of Goth nightclubs and Satanic worship. But even those murky shadows hide more than they reveal and the answers to an ever increasing number of suspicious deaths is more shocking and terrible than they could ever have imagined.