1924. Louise Noblet keeps a small hotel, the Pension Mimosas, on the Côte d'Azur in the south of France, with her husband Gaston who is also a supervisor in local casino. Many of their clientele are luckless gamblers hoping for success in the local casino. Childless themselves, Louise and Gaston have been bringing up the young Pierrot while his father serves a prison sentence, but they are dismayed when the father is released early and comes to take back his son.