As bombs rain down over London during the Blitz, Major Tommy Haupner negotiates the rubble-filled streets of Bloomsbury on his way to perform at a socialite party. The explosive event of the evening is not his virtuosic violin playing, but the 'almost-blond' American who not only insults him, but then steals his heart. The Seventh of December follows a few months in the lives of two Intelligence agents in the early part of World War Two...