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.
Paul and Virginie just had a baby boy. Happy to discover their new life as young parents, they did not imagine that their Boutchou would become the stake of a merciless struggle between the grandparents ... To gain the exclusivity of the little adored, grandfathers and grandparents. mothers are ready to implement any stratagems ...