Anthology of four love stories that have some historical basis.

Le chant du Styrène is a 1958 French documentary film directed by Alain Resnais. The film was an order by French industrial group Pechiney to highlight the merits of plastics.

A prominent politician is murdered during a demonstration. The government and army are trying to suppress the truth, but a tenacious magistrate is determined to not to let them get away with it.

On the terrace of a Parisian café, Paul Valéry observes his neighbor, Monsieur Teste. The two men strike up a conversation. A supporter of "neither god nor master", Mr. Teste engages in a regular introspection, as rigorous as it is passionate, and shares his thoughts with humor.

Auguste Maroilleur, an elderly farmer, exploits 400 hectares of crop land with the help of his family, over which he rules with an iron hand. Things go awry the day he discovers one of his grandsons is involved in drug traffic. To make matters worse, the reckless youth has hidden the white powder in the Maroilleur farm. Without a moment's hesitation, Auguste gets rid of the toxic substance but, of course, the mob has different views...

Screenwriter Philippe (Duchaussoy) imagines a crime committed by his wife Sylvie (Delon) and a mutual friend Pierre (Serre): a dead body is put in a trunk but the hand sticks out. Sylvie and Pierre begin to have an affair and things get very dangerous and the imaginary crime is on its way to becoming prophetic.

A man helps the victim of an auto accident, not realizing that the man has actually been shot. The men who shot him are now after the man who helped him, in order to eliminate him as a potential witness. Soon they are killing everyone he even comes in contact with in order to get him.