The Devil in the Box (1977)

Brissot, an uneventful executive, sees his daily life turned upside down when he learns that he is part of a "cart". Considering himself the victim of injustice, he began a hunger strike at his workplace in order to force management to reinstate him. Quickly, supporters and opponents of the striker clash within the company, while the CEO and his deputy maneuver to expel him as quickly as possible. But the framework is changing, now the devil is in the box.