It is 1943 in Paris. Like so many others, the Bourbelle family's home has been taken over by the Germans and they now live in their cellar. Little do they know that the son, Guy-Hubert Bourdelle, is far from being the cowardly hairdresser he pretends. He is in truth the Germans’ most feared opponent: le super-résistant!

Living comfortably, the Rhodes family is a quiet family. What no one knows is that Mary has a lover, Clive Root. She leaves for a few days with him and tells her husband that she is visiting a friend. Her husband surprises her in Holland, but he does not suspect the truth until later, because of an anonymous letter. Which of the two Marys will she choose