Lucas returns to his native village lost in the mountains to bury his parents. Traumatised as a kid by the death of his best friend when he was eight, he wants to put the past behind him. However, the father of the deceased friend discovers Marc might be responsible for his son’s death and relentlessly goes after him for revenge.

Judith, 7 years old, stays with her mother in her deceased grandfather's house and tries to console her.

1955, un internat en Belgique. Laurent Matagne, 17 ans, croit discerner sous l'identité de son professeur de français surnommé "Vapeur", son père disparu lors d'un raid aérien pendant la guerre 40. Vapeur est excentrique, mystérieux, inquiétant, brillant, et il communique vite à Laurent sa passion pour la littérature, au point de susciter chez lui une vocation d'écrivain. Matagne et son ami Boulette décident de mener l'enquête. Alors qu'ils échafaudent un plan pour confondre Vapeur, Matagne s'attèle à son premier roman.

Stumbling across an uncompleted 1939 film called "Princess Marushka", filmmaker Sam becomes intrigued with the young actor Sylvain Marceau, who last appeared in the film. Hoping to discover the mystery behind Sylvain's disappearance, Sam decides to make a documentary and sets off to interview those who knew Sylvain, including elderly Lisa Morain. Through her interview, Sam learns the story of Lisa and Sylvain's doomed love affair on the eve of World War II.