Two sugar rafineries are in competition with each other ;the main problem is the raw material : sugar beets ;besides the managers are not what you call scrupulous honest ;one of them ,Laverdac (Michel Simon ,whose last line is great ) lines his pockets at the expense of the factory.One of the rafineries manager has a good idea:why not unite agriculture with industry by marrying his daughter Colette to the son of the countess who provides the factory with its raw material ; but the girl is in love with the engineer and is not prepared to accept it;neither is Max, the young noble ,busy inventing useless things .As the engineer 's plans to modernize the production may be stolen and used by the competition ,Colette asks Max to keep a watchful eye on her dad's plant ;this is the best moment in a far-fetched story : Max (René Lefèvre )gets himself hired as a worker ,but he knows neither the manners nor the slang of the working class ;Lefèvre is excellent as the naive young man ,in the least bit snobbish ,like his haughty mom; his relationship with his mates on strike -and they do not know why !-who suggest he make the coffee (they get a foul brew prepared in a retort!)is priceless.Some will see echoes of the 1936 Popular Front but it's mainly a pleasant comedy which is not to be taken seriously.