Claude and Marie Verneuil will soon be celebrating their 40th wedding anniversary. For the occasion, their four daughters — Isabelle, Odile, Ségolène and Laure — decide to organize a big surprise party in their family home in Chinon. They also decide to invite, each, the parents of their respective husbands — Rachid Benassem, David Benichou, Chao Ling and Charles Koffi.

As the Paris firefighters try to stop the flames from spreading in the Cathedral, the show also follows characters being put through the wringer - they will have to fight each other, love each other, come across each other, hate each other, smile at or help each other - so that, in the end, they may have a chance to start all over again.

A catholic French couple sees their life upside down when their four daughters get married to men of different religion and origins.