Morgane Jourdan, in her forties, leads a well-ordered life with her restaurateur husband, Samuel, and their two teenage daughters, Océane and Alizée. A teacher who has become the principal of a middle school, she juggles her demanding job with her family life. Everything changes when 17-year-old Océane suddenly disappears after a party where she caught her mother in a compromising situation with Hugo Bennec, her physical education teacher. Consumed by anguish and guilt, Morgane throws herself headlong into the search for her daughter.