Alphonse Tram is unwittingly involved in several murders despite having no memory of committing the crimes. His confusion lead him to confess to his neighbour, Inspector Morvandieu. Alphonse and Morvandieu become the axis around which murders occur.
Gérard Depardieu
as Alphonse Tram
Bernard Blier
as Inspecteur Morvandieu
Jean Carmet
as Le vieil assassin
Michel Serrault
as Le comptable
Geneviève Page
as Geneviève Léonard
Jean Benguigui
as Le tueur à gages
Marco Perrin
as L'homme dérangé en pleine nuit
Carole Bouquet
as La jeune fille
Bernard Crombey
as Le médecin
Denise Gence
as L'hôtesse au château
Jean Rougerie
as Eugène Léonard
Liliane Rovère
as Josyane
