Divided into five parts, this film traces the long strike by workers at the Caravelair caravan factory in Trigniac, near Saint-Nazaire, led by the C.G.T. and C.F.D.T. unions. Shot in 1975, the film achieved the strange feat of being produced entirely by workers' producers - 15,000 of them paid in advance for their tickets - and of being amortized, and even made profitable, by being shown outside the commercial circuit alone.