Unorthodox detective Jean Lavardin is called to a provincial French town after a prank turns deadly.

Jean Poiretas Inspecteur Jean Lavardin
Stéphane Audranas Madame Cuno
Michel Bouquetas Hubert Lavoisier
Lucas Belvauxas Louis Cuno
Jean Topartas Docteur Philippe Morasseau
Pauline Lafontas Henriette
Caroline Cellieras Anna Foscarie
Josephine Chaplinas Delphine Moreasseau
Andrée Tainsyas Marthe
Jean-Claude Bouillaudas Gérard Filiol