Claude et Marie are conservative Catholics who hoped to pass on their values to their four daughters. The three oldest have all married men who are immigrants, each one with a different religion. In front of their Jewish, Arab and Chinese sons-in-law, Claude and Marie try to hide their xenophobic tendencies.

When their youngest daughter announces that she’s engaged to a Catholic man, hope is reborn in the couple. But the parents soon find out their future son-in-law is a black man from the Ivory Coast. Resigned, the couple agrees to the union. However, things get complicated when the future in-laws, dominated by an authoritarian and racist father, take part in the organization of the wedding ceremony.