Sophie, a quiet and shy maid working for an upper-class French family, finds a friend in the energetic and uncompromising postmaster Jeanne, who encourages her to stand up against her bourgeois employers.

Professor Choron recounts with his memories as a child of a barrier guard, the 2nd World War with its horrors and the trains he saw during those years leaving for Germany or coming from there, full of French or German soldiers, in conquest or in rout according to the period