François Durrieux, a man in his forties, married to Clémence and father of Benjamin, has been employed for years by the firm DSBO. In order not to lose his job, he always submits to his boss's demands whether it means working after office hours, canceling planned holidays or harming his family life. However, when one night, Simon Lacaze, his best friend and colleague, commits suicide just after being fired ignominiously, François rebels.