Luc Froment, a reform-minded engineer, starts working at a steel mill in a small town. There he founds small groups of workers (and their families) under miserable conditions. Under the influence of Fourier's ideas, Froment tries to turn the mill into a workers' co-operative.

Léon Mathot
Luc Froment

Huguette Duflos
Josine

Raphaël Duflos
Delaveau

Claude Mérelle
Fernande Delaveau

Juliette Clarens
Suzanne Boisgelin

Marc Gérard
Martial Jordan
Raymond Fabre
Bonnaire

Camille Bert
Ragu

Andrée Brabant
Nise Delaveau

Andrée Lionel
Soeurette

Henri-Amédée Charpentier
Le père Lunot
Edoardo Davesnes
Morfain

Paul Amiot
Feuillat

Gilbert Dalleu
Jérôme Gurignon

Delaunay
Le président Gaume