After three successful years living and working in America, French-Jewish actor and comedian Gad Elmaleh decides to move back home to Paris. He misses his family and friends. Or at least that's what Gad tells his loving yet overbearing parents, Régine and David. However, it's not long before his parents find out the true reason for their son's return — after a long period of ambivalence towards his own Jewishness, Gad has officially decided to convert to Catholicism. Dumbfounded by his sudden obsession with the Virgin Mary, and with only five weeks before his baptism, Gad's family endeavor to bring him back to Judaism for fear of losing him forever.