The Count of Kerlor, to chastise his wife whom he believes to be unfaithful, entrusts his son to a couple of scoundrels. When he repents and wants to find the child, the carnies make their nephew sick. But the other little boy, in search of his comrade, is recognized by his reconciled parents.

In 1914, during the First World War, the rich chatelaine de Boissière, with a sulphurous past, took in Jean le Barois, a young soldier lost in territory occupied by the Germans, who was none other than the son of the man she loved, then ruined. The young man, after having despised her, falls madly in love with the woman who pushed his father to suicide.

Father Vincent is trying to build a church in the California neighborhood. Greeted by stones, he must face a sinister band of deviants excited by a shady cabaret performer. The abbot resists, gradually builds his church and regenerates all the wretches with whom he lives and especially the hardest, Bibi.