It is 1915 when Richard Hannay is injured on the Western Front. He is convalescing in London when he is approached by Sir Walter Bullivant of British Intelligence. Bullivant’s son has been working undercover in the Middle East where he has made a terrifying discovery. The Germans with their Turkish allies are planning to stir up a revolt in the Muslim world that could leave Egypt, India and North Africa in disarray.
The young man was on the way home when he was murdered. The only clue he has left behind is a piece of paper bearing the words ‘Kasredin’, ‘cancer’ and ‘v.l’. Hannay is asked to take up the trail that will take him across Europe and into the heart of Istanbul. It is a mission as dangerous as it is vital: at stake could be the outcome of the war.