Pierre Belcroix and Marcel Blanc are violinists and lifelong friends living in Paris in the 1920s. While Marcel has become famous and Pierre has not, both are happy with their lives. Pierre is happily married to Romaine, a stylish young flapper. However, Marcel meets and falls in love with her, which Marcel little suspects.
Elisabeth and Simon have been deeply in love for two months when Simon momentarily dies, but comes back to life. Simon does not want any further medical tests, but the couple are forced to grapple with the possibility of his death. They eventually 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..
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 in the experiment causes the man to experience moments from his past in a random order.
Delphine and Solange are two sisters living in Rochefort. Delphine is a dancing teacher and Solange composes and teaches the piano. Maxence is a poet and a painter. He is doing his military service. Simon owns a music shop, he left Paris one month ago to come back where he fell in love 10 years ago. They are looking for love, looking for each other, without being aware that their ideal partner is very close...
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.
