Matthieu and Eric are two brothers who work at the same factory as their father in Normandy. When his father is dismissed for smoking on the factory floor, Matthieu is incensed and tries to have him reinstated, in vain. His brother has just got married and, with a child and mortgage on the way, is reluctant to stir up trouble. Likewise, Matthieu's fellow workers refuse to get involved. Then tragedy strikes; Matthieu's father is killed in a road accident. Convinced that his father was driven to suicide, Matthieu resolves to have his revenge. His plan is to lure his boss's wife, Claire, into an affair and so make his boss a laughing stock. Seducing Claire proves easier than he could have imagined, but then the scheme goes awry. Matthieu and Claire fall in love.