The twins (Nadia and Mona) live in peace in Cairo with their father, a university professor, and their French mother. While Nadia is shy, Mona is bold and free. Nadia is exposed to a fire accident, and the father dies, so the family is forced to travel to France, where Mona also dies, but after... Nadia writes to Dr. Medhat with a picture of Mona, and he is about to come to France to see her, so Nadia falls into trouble for fear of discovering her true nature.