Classic tale of spying, intrigue and romance, based on the novels of Alan Furst. A German engineer arrives in Warsaw. In a cafe in the city's factory district he meets with Colonel Mercier and information is exchanged for money. Mercier loathes the niceties of ambassadorial lunches, cocktail parties and banquets of a world in which the drums of war can be heard in the background. However, they take on a more interesting dimension when he meets the enigmatic and beautiful Anna Skarbek. While secretly observing panzer exercises in the Black Forest, Mercier sees a simple trick performed with a length of pipe strapped across a car and draws his own conclusions about exactly what it is the Germans are planning. When the Nazis find out what he's been doing, his own life becomes their target.