Marion (Valeria Bruni Tedeschi) and Gilles (Stéphane Freiss) are living their last minutes as a married couple. After having formalized their divorce, they will make love for the last time in a hotel, but the experience is rather traumatic for Marion, contributing to increase the crisis between them. From this point, the story, broken down in 5 episodes, will run backwards, telling us the couple's married life, showing us their devoted love to their little son, but also how Gilles hurt Marion in several ways. Then, we see Marion's labour at the hospital, with an indifference attitude from Gilles about the matter. The two last episodes, tell how was the wedding, the party and the wedding night, and finally, how Marion and Gilles met each other during a trip in the Italian coast.