In a grimy flat in the city of Cork, a man lies dead. His face is unrecognisable: seven gunshots have shattered cartilage and bone. Yet DS Katie Maguire, of the Irish Garda, knows exactly who he is. Amir Xaaji Maxamed, an evil man who trafficked young girls to be sold for sex. When a second pimp is killed, Katie must decide. Are these vigilante murders justified? And can she stop them spiralling out of control?