A senior British detective is on leave in Spain, as he tries to come to terms with the tragic death of his wife. The unexpected arrival of an old friend and colleague results in a chase across the Mediterranean, as they pursue a killer that has overshadowed both of their careers. They uncover a web of intrigue far beyond their expectations and are drawn into events of world changing proportions. One of them will come face to face with terrorism and the forces that have shaped the thoughts of man through the ages.