The Greater Good, or the Passion of Boule de Suif
During the Franco-Prussian War, a group of French travelers flee Rouen by coach. They initially scorn the prostitute Boule de Suif, but accept her food and friendship during the journey. Detained by Prussian soldiers, the group learns they can leave only if Boule sleeps with the commandant; they eventually pressure her into complying, then ostracize her again when the journey resumes.