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: at first she takes her son abroad with an excuse and then has her grandson kidnapped making Luisa think the boy died in a fire.

　　

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. Poor Guido is in despair, but soon he meets Lina, a woman who is a dead ringer for Luisa.

　　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. Poor Guido is in despair, but soon he meets Lina, a woman who is a dead ringer for Luisa.