Marianne and Clara, two cousins, are reunited with their husbands in their late aunt's house to try to agree on the sale of her. And they have one goal in mind with the money they could raise from it, namely to open a new hair salon. Except that on this occasion, they quickly realize that they share more things than they thought... And it is not the American couple Babeth and Bill who will calm their ardor, they who initially came to reconnect with the deceased aunt. Because the latter, who come straight from the United States, teach them the basics of free relationships, very fashionable across the Atlantic. Between unbridled unions, exchanges and role plays, what if this was the recipe for happiness?