Bérengère and Vincent get married, respecting bourgeois traditions. Adhering to custom, families and friends gather together in the countryside on a fine spring day. It's a joyful day for some, painful for others; in any case, it's a decisive and unforgettable day for all. But as blood ties aren't always ones of the heart, this day will quickly become the "hour of truth", all generations combined.

Ten years after high school, Bruno, Momo, Leon and Alain meet together at the maternity hospital for the delivery of Sophie. She was the girlfriend of Tomasi, their former classmate and the father of Sophie’s baby. Tomasi died one month before due to an overdose. There, they remember their teenage life, their laughs, their dreams, their stupid pranks... Through the past of the five main characters, a description of the French youth in the middle of the seventies.

Vincent et Rebecca ont à peine 18 ans et s'aiment avec passion et insouciance. Pourtant, deux mois après leur rencontre, le corps de Vincent est repêché dans le Rhône et Rebecca a disparu. L'inspecteur Hervé Cagan et sa coéquipière Karine Mangin enquêtent. Alors qu'ils remontent le fil de l'histoire d'amour qui liait les deux amants, ils se retrouvent confrontés aux failles de leurs propres vies.

Lina and Miguel are a poor married couple who are trying to survive. When they move to a nearby slum, Lina and Miguel have no choice but to join the local scavengers digging through a garbage dump in order to survive. Advancing in years, Lina still dreams of becoming a mother despite Miguel's lack of enthusiasm. Somewhat magically, her prayers are answered and she becomes pregnant. In her flooded house during a storm, she gives birth to a son. However, when her son turns out to be a fish, Lina's love for her offspring, as well as her marriage to Miguel, are tested by the strange and surreal moments that surround them.