As the Baghdad Museum of Antiquities is looted, a teenage Iraqi boy finds an ancient clay tablet in a long-forgotten vault... At a rally for the signing of a historic deal between Israel and the Palestinians, an assassin pushes through the crowd towards the Israeli Prime Minister. Bodyguards shoot the man dead. But in his hand there is no gun: only a blood-stained note... A series of apparently random tit-for-tat killings follows as tensions boil over. Washington calls in star peace negotiator Maggie Costello. Menaced on all sides by violent extremists, Costello is plunged into a mystery rooted in the last unsolved riddle of the Bible. The truth could end hostilities - or spark the war to end all wars.