Recovering from an attempted suicide, a man is selected to participate in a time travel experiment that has only been tested on mice. A malfunction causes the man to experience moments from his past in a random order.

In seven different parts, Godard, Ivens, Klein, Lelouch, Marker, Resnais, and Varda show their sympathy for the North-Vietnamese army during the Vietnam War.

At a weekend gathering, a man tells a woman that they had spent time there together a year prior. But, the woman has no recollection whatsoever and is convinced that he is simply fabricating the encounter. The more he speaks about their activities the previous year however, the more compelling he becomes. The question remains however – did they meet previously or not?

In the carefree days before World War I, introverted Austrian author Jules strikes up a friendship with the exuberant Frenchman Jim and both men fall for the impulsive and beautiful Catherine.

Elisabeth and Simon have been deeply in love for two months when Simon momentarily dies, but returns to life. Despite declining further medical tests, the couple are forced to grapple with the possibility of his death. Eventually, they tell their close friends Jérôme and Judith Martignac about the event. The Martignacs are both clerics, and Judith has just been giving a funeral service for a villager who committed suicide, though Jérôme would have nothing to do with suicide...

In 1920s Paris, violinists and lifelong friends Pierre Belcroix and Marcel Blanc are happy with their lives, although Marcel has become famous and Pierre has not. Pierre is married to Romaine, a stylish young flapper. However, Marcel meets and falls in love with her, which Marcel little suspects.

Biarritz, 1933. Charm and talent assist small-time swindler Serge Alexandre, alias Stavisky, to bribe his way into the centre of French politics. But when his great scam involving millions is exposed, he brings the government to the verge of collapse and the country to the brink of civil war.

On his way from Madrid to Paris, Diego, a chief of the Spanish Communist Party, is arrested at the border for an ID check but manages to flee. When he arrives in Paris, he searches for one of his comrades to prevent him from going to Madrid where he could be arrested.