Camille, a mercurial César-winning actress, has seen better times. Estranged from her husband, she's with her children only every other weekend. It's her weekend, but her agent has booked her to MC a Rotary club dinner in Vichy. She takes them with her, and when her husband learns this, he demands to pick them up at once. She bolts in a rented car to the seaside, trying to improve her relations with the children, especially the precocious and distant Vincent. He loves astronomy. A rare meteor shower is due in a few days, so she suggests they go to a plateau in Spain hoping to see it. He agrees, but the relationship remains difficult, and her husband is on their trail.

William’s great surprise, his cousin Clovis, whom he did not see again since around thirty years, arrives from New York to visit him. Reunion between both men creates one thousand memories: always so collusive, they become fast inseparable, living again, the space of moment, their young years… Only Elizabeth, wife of William, who has just lost her father, does not share their cheerfulness.