Isabelle Vernoy marries an Arab named Rashid Benam, and her sister Odil marries a Jew named David Benu. Isabelle's parents are unhappy with her marriage, but they accept her choice. The family disputes about raising their son, Xiao Ling, and their marriages. During a family breakfast, Claude and Marie argue about their daughters' marriages, leading to conflict and misunderstandings. The girls try to improve relations, but their husbands attack their martial arts skills.