Paris, 1941. The City of Light, occupied by the Nazis, is dark and silent at night. Streetlamps are painted blue and apartment windows draped or shuttered in the blackout ordered by the Germans. But when the clouds part, the silvery moonlight defies authority, and so does a leader of the French Resistance, known as Mathieu. In Paris and in the farmhouses, barns, and churches of the French countryside, small groups of ordinary men and women are determined to take down the occupying forces of Adolf Hitler. Mathieu leads one such Resistance cell, helping downed British airmen escape back to England.