Guido Carani, an engineer of noble descent, has just lost his son born to him by a chorus dancer, who, desperate, has become a nun. After a while he also loses his wife and daughter in a car accident....
The tragic love story between Guido, the owner of a marble quarry and Luisa, the humble daughter of one of his employees, ends up in her giving birth to a baby boy. Giulio's mother is against them...