A second-class horror movie has to be shown at Cannes Film Festival, but, before each screening, the projectionist is killed by a mysterious fellow, with hammer and sickle, just as it happens in the film to be shown.

A woman, believed to be the widow of a certain Edouard, finds herself urged to reveal to her 3 children some very embarrassing news, but not without importance. The many consequences that result will not disturb their respective betrothal.