On an otherwise normal day, Étienne, a happily married man and a good father, sees something that stops him dead in his tracks: a gorgeous woman in a billowing red dress. Long after she has left his vision, her memory continues to haunt his mind. He falls instantly in love with her and tries everything to get to know her better. Helping Étienne snare his elusive lady in red are his three bumbling buddies, which all have secret affairs and/or cheat on their wives.
A young woman's comfortable life with her boyfriend is disrupted when he leaves for military duty, entrusting her to a playboy friend seeking a fake marriage for inheritance. Complications arise as a prince enters the scene, pursuing her romantically.
During the stagecoach trip of a frightened group of inhabitants of Rouen, Elisabeth Rousset, known as "Boule de Suif", renders these people a signal service, but comes up against their stupidity and their sufficiency. A little later, Boule de Suif assassinates the formidable Prussian lieutenant whom his friends had nicknamed Fifi and who shamelessly displayed his taste for pillage and his sadistic tendencies.
