In the late 1980s, Rose moves from the Ivory Coast to the Paris suburbs with her two young sons, Ernest and Jean. Spanning 20 years from their arrival in France to the present day, the film is the moving chronicle of the construction and deconstruction of a family.

César is 12 when his older sister Lou is the victim of sexual assault. In the changing rooms of his fencing club, the only standard that matters is violence. César wishes he could measure up but may not be armed for the fights to come.