Gemma, daughter of a lodger, is in love with her half-brother, but since she cannot marry him she ends up marrying a teacher. She doesn't love him and betrays him but is blackmailed by a Romanian countess who forces her to become a prostitute. She's desperate but in the end she asks her husband for help. She has learned to love him in the meantime.—Salvatore Santangelo <[email protected]>