June 1944, a French town towards the end of the occupation. Following several attacks perpetrated by the resistance, the inhabitants who listen to English radio are rounded up by the Germans in a prison and considered as hostages. In one of the cells are found men from all walks of life: an aristocrat, the Viscount of Saint-Leu, Doctor Noblet, a resistance fighter, Béquille the wanderer with a wooden leg, and a strange character nicknamed "Black Market". The latter arouses mistrust among the prisoners, because it could well have been introduced by the enemy.

During the second world war, two British officers, Brand and Leith, who have never seen combat, are assigned a vital mission. Their relationship and the operation are complicated by the arrival of Brand's wife, who had a tryst with Leith years earlier.

A secret agent is dispatched to find a rare and valuable drug.

A gangster escapes jail and quickly makes plans to continue his criminal ways elsewhere, but a determined inspector is closing in.