Cécile returned to the village of her childhood to marry François, a young surgeon from Lyon. She reunites with her parents, Antoine and Marie, who run a small family hotel and also meet her first love, who has become mayor of the village. A few days before the ceremony, the young woman begins to feel overwhelmed by events. A young meteorologist arrives in the village and announces an extremely rare phenomenon to come: the imminent passage of a comet which should upset the atmosphere and trigger torrential rains.