Since they last met, life has moved on for Yusuf Khalifa of the Luxor Police and Jerusalem detective Arieh Ben-Roe. About to become a father for the first time, Ben-Roi finds himself investigating a gruesome murder in Jerusalem's Armenian Cathedral. The victim, a journalist named Rivka Kleinberg, had been researching an article into the Israeli sex-trafficking industry. When a link emerges between Kleinberg and an English engineer who disappeared from Luxor in 1931, Ben-Roi turns for help to his old friend and sparring partner Khalifa. Khalifa's life too has changed, although in his case not for the better. Preoccupied with personal tragedy and immersed in an investigation of his own - a series of mysterious well-poisonings in Egypt's Eastern desert - he agrees for old time's sake to do some digging for his Israeli colleague. In the process Ben-Roi might just be giving Khalifa his lust for life back. Inexorably the two investigations entwine, drawing Ben-Roi and Khalifa into a sinister web of violence, abuse, corporate malpractice and anti-capitalist terrorism. And at the heart of the web lies the Labyrinth - a three-thousand year-old ancient Egyptian mystery that has already taken Rivka Kleinberg's life - and hers will not be the last.