In the fall of 1994, 15-year-old Simon went to the convenience store and never came back. The next day, the body of the teenager is fished out of the river. 27 years later, his younger sister Élise tries to understand why he threw himself off the bridge. Helped by Philippe, a charismatic pastoral animator who led Simon's self-help group, she discovers that everything is always more complex than it seems.
Maxime is a young Valdorian who works in a gold mine. As he experiences several difficulties as he goes through life, he will question his definition of masculinity. It's with the help of the tightly knit brotherhood of colleagues in the mine that he will find the necessary support to overcome a feeling of stubborn guilt which prevents him from achieving happiness. Until the day an explosion breaks out underground. As part of the rescue mission, Maxime descends into the mine lair with the firm intention of bringing each of his colleagues back to the surface alive.