Four Anglo-Canadians and a New Yorker find themselves in a two-week long total French immersion program in the fictional, remote town of St-Isidore-du-Coeur-de-Jésus, tucked away somewhere in Northern Quebec. The place is perfect for total immersion since, according to the most recent census, 99% of the population is comprised of pure laine Quebeckers for the most part unilingual French, fervently nationalist, and all, save one person, named Tremblay.

In Paris, Clara, psycho motor therapist, and Ismaël, music teacher, have been lovers for four years. Happy, the couple are expecting their first child and decide to move in together. But the news is not well received by their respective families because Clara is Jewish and Ishmael a Muslim. Although not practicing, this difference will gradually sow trouble in their love life.