The action takes place in a metallurgical factory which was part of the Pechiney-Ugine-Külhman trust in Couëron, Loire-Atlantique, in 1975. To show their solidarity with their husbands on strike, workers' wives invaded the director's office and obtained in two hours what was refused to them for months. But the management complained and sued. Twelve wives were charged with forcible confinement. The mobilization then widened. The women called on the Bretagne Cinema Production Unit (UPCB) to make a film about their struggle. Narrating the courageous action of solidarity of women with the strikers of the factory and the emergence of a collective awareness, both feminist and working-class, the film is also an echo chamber sensitive to the aspirations of the twelve women who were charged.