
Doctor Valois has invented the "flashage", a cure for depressed people. After having tested it on monkeys, he tries with a first human patient, Alain Durieux. This is great success, everybody's happy except may be Alain's wife, Jeanne, who's worrying about the changes in Alain's personality. Other patients use the treatment with similar successes, and Valois's happy about it. But the monkeys are changing: non-cured ones are made mad by the over-stability and stereotyped behaviour of the cured ones. So are the humans. When Valois realises he can't stop the process, he decides to "flash" himself.
Alain Durieux

Pierre Valois

Jeanne Durieux

Édith

Marc Lebel

le responsable du zoo

une agent d'assurance

le directeur furieux

le directeur de l'usine

M. Borne

Armand

Sophie

Nicole, une femme nue à la piscine

Giraud

Cordier

Joëlle
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Christiane

Le réalisateur du reportage

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Siclier

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Une 'flashée'

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Malade Psychiatrie

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Le contrebassiste
Désiré Rech et ses chimpanzés
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La Petite Fille Insolente

(uncredited)

Un collègue d'Alain Durieux (uncredited)
