On a prestigious campus blanketed in snow, three friends are united by a tragic secret. A young woman vanished in the night. Côte d'Azur - Winter 1992. On a freezing night, while her school campus is paralyzed by a snowstorm, Vinca Rockwell, 19 years old and one of the top students in her prep class, flees from her philosophy teacher, with whom she had a secret relationship. For Vinca, "love is all or nothing." No one will ever see her again. Côte d'Azur - Spring 2017. Once inseparable, Vinca's best friends—Fanny, Thomas, and Maxime—haven't spoken since their school days ended. They meet at a reunion. Twenty-five years ago, under horrific circumstances, they committed a murder together and hid the body in the school's gymnasium. Today, it is being completely demolished to make way for a new building. Nothing can now prevent the truth from coming to light.