A large farm in Vendée. The father is dying and the three brothers and sister swear not to marry not to break up the field. Months pass. Francis, the eldest, took things in hand. For him, the promise to their father is sacred. So he does everything for his brothers and his sister Amanda are not tempted. However, the latter lets himself courted by a young man from the neighboring village ...
Isidore Lechat is a ruthless self-made man whose money allows him to humiliate the others, particularly a ruined noble: he wants his daughter to marry this marquis's son but the girl is in love with a young scientist.
Monsieur Benoit's existence is transformed when his dour wife suddenly thinks in a bout of folly that she will become a chanteuse and her husband the impresario.
