The film portrays the events on the day King Henri III of France arranged for Duke Henri de Guise to be murdered.
The aunt of Alfred Puc, a meek tax-collector in Paris, dies while riding in a moving van. The driver, not wishing to be bothered by a police interrogation, hides her corpse in a cupboard before notifying Alfred. But the van is stolen. Alfred, being the heir of a rich lady, begins a frantic search to locate the missing van and the cupboard because one can't claim an inheritance if there is no 'corpus delecti.' In his search, he gets caught up in an underworld web and finds the body of a murdered gangster in his room. He finally locates the cupboard but promptly loses it again. But, wait, it isn't "finis' time, yet.
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.
