In a moment of madness a middle-aged, married and respectable pharmacist kills a young woman who is sun-bathing by a lake. Unable to take in what he has done, he flees from the scene of the crime and behaves as if nothing has happened. Eventually her boyfriend is charged with the crime and, in a strange twist of fate, the killer finds himself serving on the jury.
Bernard Blier
as Grégoire Duval, pharmacist
Maurice Biraud
as Doctor Hess, veterinarian
Francis Blanche
as Attorney General
Danièle Delorme
as Geneviève Duval, Grégoire's wife
Jacques Riberolles
as Sylvain Sautral, photographer and accused
Yves Barsacq
as Maître Adreux, defense lawyer
Henri Crémieux
as Medical examiner
Robert Dalban
as Garampon, fisherman on his boat
Anne Doat
as Alice Moreux, Sylvain's mistress
Madeleine Geoffroy
as Mrs. Sevestrain, witness at the hearing
Françoise Giret
as Catherine Nortier, the victim
Camille Guérini
as President of the tribunal
