An unemployed investor creates a fictious business partner to attempt to improve business. Eventually, his creation gets out of control as his business becomes successful and his wife announces that she is in love with the partner and his son wishes the partner was his father -- although no one has ever seen him. To regain control, the man decides to "kill" his imaginary partner and is arrested for the murder.
Michel Serrault
as Julien Pardot
Claudine Auger
as Agnès Pardot, épouse de Julien
Catherine Alric
as Mme Alice Duphorin, épouse de Marc, amante de Julien
Judith Magre
as Mme Breol, la secrétaire de Julien
Bernard Haller
as M. Hellzer, propriétaire d'une banque
Marco Perrin
as Colonel Vauban, administrateur de sociétés
Jean Martin
as M. Bastias
Fabrice Josso
as Thierry Pardot
Henri Virlogeux
as M. Urioste, agent de change
Mathieu Carrière
as Louis, ami de Julien
Vadim Glowna
as Me Marc Duphorin, avocat d'affaires véreux
Astrid Frank
as Mme Marie-Claude Hellzer, amante de Louis
