On September 1st, 1939, Nazi Germany invades Poland, unleashing World War II. On September 17th, the Soviet Red Army crosses the border. The Polish army, unable to fight on two fronts, is defeated. Thousands of Polish men, both military and government officials, are captured by the invaders. Their fate will only be known several years later…

A writer stumbles upon a long-hidden secret when he agrees to help former British Prime Minister Adam Lang complete his memoirs on a remote island after the politician’s assistant drowns in a mysterious accident. In director Roman Polanski’s tense drama, the author realizes that his discovery threatens some very powerful people who will do anything to ensure that certain episodes from Lang’s past remain buried.

Poland, 1945. Mathilde, a young French Red Cross doctor, is on a mission to help the war survivors. When a nun seeks for her help, she is brought to a convent where several pregnant sisters are hiding, unable to reconcile their faith with their pregnancy. Mathilde becomes their only hope.