After freeing Baghdad from its terrible ruler, Aladin delays his marriage to the princess until a new dictator arrives to take over the city.

Monsieur Naphtali is a good-natured but somewhat feeble older man turned away from the rest home where he lives. In search of a place to stay, he finds his way to Paris, where a woman taking surveys takes pity on him and brings him home for a meal and a bed for the night. Naphtali finds himself spending the evening with the survey woman, her brother who works in publishing, his lovely but unhappy wife, an alcoholic doctor, and his wife, an ill-tempered judge. In a simple and unpretentious manner, Naphtali forces them all to open up about themselves and discuss elements of their lives that they usually prefer to avoid.

At his wedding Claude Sams has an argument with his son about his life-style; in anger Paul leaves. Together with a friend he sets out for Vegas to search a job. While changing a tire on the highway, he's killed by a passing truck. The police believes it's been an accident, but Claude doesn't accept this and frantically searches for a yellow truck and it's crazy driver at all truck stations.