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.
| Writing | Henri Pouctal | Screenplay |
| Writing | Émile Zola | Novel |
| Directing | Henri Pouctal | Director |
| Camera | Louis Chaix | Director of Photography |
| Camera | Georges Guérin | Director of Photography |
