France, 1940 

The German army has marched into Paris. Three siblings, three very different people leading very different lives, find themselves face-to-face with new occupants of their city, and neither of them can guess what the occupation has in store for them, and how it will change their lives once and for all. Giselle Legrand, a renowned novelist and a socialite, encounters an unannounced guest in her apartment - a newly arrived chief of the Gestapo, Sturmbannführer Dr. Karl Wünsche, who is intended to billet there and who soon starts making rather unwelcome changes in Giselle's lifestyle. Strong-willed and defiant, Giselle gets involved with one of the first Resistance cells, refusing to submit to the newly established authority despite the developing relationship between the two. 

Kamille Blanchard, a new widow of the war left alone with a small daughter, is dreading the approaching army. However, she never expected that she could find love in the arms of an officer, who appears at her door as soon as the German army marches in. But will Kamille be able to trust a former enemy when he has to choose between his feelings and duty for his country? 

Marcel Legrand, a former history student and a deserter, fearing capture by the Germans has no other choice than ask for help from the ones he used to fear and avoid - the mysterious communists, who call for an uprising and freeing their country from the Nazi plague. 

Soon, the fates of all three siblings will become intertwined in a dangerous knot, all of them, fighting for the same goal: a liberated France.