When the disappearance of children and bloody murders multiply in a small mountain village, an old legend shrouded in sulphur reappears... Commander Guardiano and Captain of the Gendarmerie De Rolan are forced to join forces to uncover the truth.
Kenza and Yaël are two young French women who go to Syria to fight alongside the Kurdish forces. There they meet Zara, a Yezidi survivor. Born in different cultures but deeply united, the women-fighters heal their past wounds and discover their present strength, especially the fear they inspire in their opponents. The three young women soon bound together and become true sisters-in-arms.
Laura, 25, is an actress in a L.A.R.P. (Live Action Role Playing) Game, where the participants play the survivors of an atomic war who live underground in a sealed bunker. After several mysterious accidents, the game is interrupted and the players leave the bunker while the staff remain behind to investigate the disappearance of Greg, the mastermind of the game. They soon find themselves trapped inside and in peril as they begin to die in mysterious ways and the group realizes that someone or something paranormal is playing a twisted game with them which quickly plunges into a terrifying fight for survival.
Yara, a 25-year-old Moroccan girl who has come to study in Paris, has not left her home for several months, as she has been agoraphobic since childhood due to terrible family events. Her only contact is with her grandmother, Najiyah, by telephone. One evening, a mysterious apparition disrupts her daily routine, forcing her to relive her worst fears, driving her to the brink of madness.
