1919. The eyes of the world are on Paris, where statesmen, diplomats and politicians have gathered to discuss the fate of half the world's nations in the aftermath of the cataclysm that was the Great War. A horde of journalists, spies and opportunists have also gathered in the city and the last thing the British diplomatic community needs at such a time is the mysterious death of a senior member of their delegation. So, when Sir Henry Maxted falls from the roof of his mistress's apartment building in unexplained circumstances, their first instinct is to suppress all suspicious aspects of the event.