Derniers remords avant l'oubli

A Sunday in the countryside, in the mid-80s, in a house where three of the characters had a love affair fifteen years earlier. Then they parted ways. Pierre still lives alone in this house. Hélène and Paul married separately, elsewhere.
On this day, they return, with embarrassed spouses and an insolent child, to discuss the sale of the house they once bought together and which has appreciated in value, because they need money.
But is that all they've come for? There are sentimental corpses in the closets, dead ideals, secrets, and remorse...