Mousse and Louis are young, beautiful, rich and in love. But drugs have invaded their lives. One day, they overdose and Louis dies. Mousse survives, but soon learns she's pregnant. Feeling lost, Mousse runs away to a house far from Paris. Several months later, Louis' brother joins her in her refuge.

At a lakeside hotel, Michel Piccoli discusses the centennial of cinema with Jean-Luc Godard. Godard asks why should cinema's birthday be celebrated when the history of film is a forgotten subject. Through the remainder of his hotel stay, Piccoli tests Godard's hypothesis.