The honorable Madame Besson, who sent her daughter Adrienne to the Provençal convent, becomes, in the evening, the ignoble Madame Samarra, owner of a company in Algiers. Her accomplice, Nicolas Molesco, prevents her from escaping from her infamous profession. However, Adrienne's return to her mother, Adrienne, whom Molesco covets, and who only escapes through the intervention of Madame Samarra whom she does not recognize as her mother. And, the investigation of the young Director of Security: Jean Marsac leads to Molesco and Mrs. Samarra in whom he recognizes the honorable Mrs. Besson. Molesco is later killed by a sailor whose sister he dishonored. Adrienne forgives her mother who sacrificed herself for her, and was nothing but a victim of society.