After discovering the truth about their origins, thanks to DNA tests with results that were nothing short of astonishing, the Bouvier-Sauvage and the Martin families decide to bury the hatchet and organise their children’s wedding. But they hadn’t bargained for a major twist: a cousin of Frédéric was found thanks to the tests… revealing that the results were wrong. The two families will discover that their ancestors still have a few surprises in store for them!