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 their baby boy. Giulio's mother is against them: first she sends her son abroad and then has the baby kidnapped, making Luisa think the boy died in a fire.
Stefano and Maria have a marriage by proxy while he is working abroad in Canada. When she is mistakenly accused of abandoning her own child and sent to jail, Stefano finds out and decides to annul their marriage.
