Sin pecado concebido.

Adrián is the son of Claudio and Amparo Martorel, the owners of a perfume factory and the ranch "La Encantada", where Mariana also used to live when she was a little girl under Amparo's protection. However, a terrible event forces Mariana to leave the house and to enter a boarding school, while her brothers and father stay at the ranch. In the convent she meets mother Ángeles and sister Jovita, who along with father Gonzalo, become her spiritual advisors, and she thinks of becoming a nun. Five years later her father dies and she has to take care of her brothers, so she returns back to the ranch where again she meets Adrián, who has just returned back after getting his master degree in Chicago. Both discover that their adolescence love is still alive, but Adrián is now engaged with the ambitious Raquel, who will not stop at anything to separate them.