While celebrating his birthday, police inspector Basquier recalls two of his most celebrated cases. The first involves duplicitous moneylender Olga. The second concerns the brutal broad daylight murder of innocent young Yvonne.

Bernard Blier
as Commissioner François Basquier

Suzy Prim
as Mrs. Olga, pawnbroker

Andrée Clément
as Arlette Génod

Yves Robert
as Inspector Paulhan

René Blancard
as Doctor Corbier

Guy Decomble
as Emile Kortenwirth

Véronique Deschamps
as Yvonne Chouquet, Courvoisier's employee

Arthur Devère
as Mr. Forgeat

Paul Frankeur
as Mr. Mallet

Julien Verdier
as Mr. Guy Couvoisier, jeweler