The next morning, the nurse leaves for the town of Argenton, giving a lift to another resident who is breakfasting in the bar. This resident is a professor at the police academy. He is dropped off at work where he gives a lecture to a class of delinquent policemen, who behave like schoolchildren, on the subject of the relativism of laws, customs and taboos. The lecture is constantly interrupted, until only two officers are left in the class. The professor continues, using a dinner party at his friends' house to illustrate a point he is making. We then cut to the 'dinner' party which is being held in a modern bourgeois apartment.