In a small town in central France, Simon is a priest devoted to his parish. During a mass, Louise, whom he hadn’t seen since his seminary years ago, reappears. She introduces him to Aloé, an 11-year-old child, who is his son. This news will disrupt his daily life: can he be a good priest for his parishioners and a good father for his child? Simon will try to convince the highest authorities of the Church that his vocation is compatible with paternal love.
After the death of her father, 22-year-old Céline inherits most of his estate, but gives it to her stepmother, causing her greedy fiancé to leave her. Following several failed suicide attempts, Céline is hospitalized and comes to the attention of a nurse, Genevieve, who has struggled with depression. Under her personal care, Céline gradually recovers, and the two women grow close.
Felicie and Charles have a whirlwind holiday romance. Due to a mix-up on addresses they lose contact, and five years later at Christmas-time Felicie is living with her mother in a cold Paris with a daughter as a reminder of that long-ago summer. For male companionship she oscillates between hairdresser Maxence and the intellectual Loic, but seems unable to commit to either as the memory of Charles and what might have been hangs over everything.
Longtime friends Guarrigue and Sénanques own a successful law practice in Paris. The dreaded businessman Pervillard is one of their clients. One night, Sénanques, who is in an unhappy relationship, meets Sacha. For her sake, he causes a political scandal involving Pervillard and puts himself in danger.
In the Middle Ages, the earl Wetter von Stahl is accused of having bewitched Catherine, the daughter of the blacksmith of Heilbronn. The earl tries to be exonerated by proceeding himself to the interrogation of the young woman, who apparently shows an "unnatural possession".
The film chronicles Perceval's knighthood, maturation and eventual peerage amongst the Knights of the Round Table, and also contains brief episodes from the story of Gawain and the crucifixion of Christ.