Autumn 1963: After passing their high school exams, Celine, Alex, Louis, and Paul spend the following days in a frenzy, driving around in Louis' father's old Hudson, taking boat trips on the lake, going to the cinema, turning night into day, drinking too much wine, and passionately debating the meaning of life. Paul, in love with Celine, discreetly seeks her company, while Alex, projecting his own desire for Celine, believes she wants to sleep with him, and Louis plays his games with her behind his Jack Kerouac mask. Celine, full of suppressed passion, responds by seducing him. During a nighttime boat ride, Louis jumps into the water for a quick swim and goes missing - a shock that changes everything. Celine, pregnant with Louis' child, marries Paul, and Alex, who wanted to become a writer, becomes a doctor like his father. 30 years later.