Pierre Gastié-Leroy is the son of a wealthy director of a factory of weapon manufacturing. Despite his parents, two generous uncles and a bishop godfather who try to inculcate him the rigid values of his social level, Pierre is a dreamer, antimilitaristic, social educator who dreams of saving three thugs, his "little guys" at the limit of delinquency. After several resounding failures that sent him to prison, Pierre is ordered by his father to join his factory to direct the social service. Tired of the venality of his father and the foolishness of the "little guys", Pierre hires them at the factory.