Based on the Cuban radionovela of the same name written by Félix B. Caignet adapted for TV by Fernanda Villeli and directed by Raúl Araiza.

The doctor's name is Alberto Limonta and he begins recounting the story of the Del Junco family..... Don Rafael Del Junco (Ignacio López Tarso) is the severe patriarch of a respected Veracruz family and demands absolute obedience from his two daughters María Elena and Matilde (real-life sisters Verónica and Beatriz Castro) and his wife Dona Constancia.

As Alberto decides not to reveal that Maria Dolores is not his real mother, Cristina, a hospital volunteer, played by Erika Buenfil falls in love with him.

A dramatic turn of events happens when Don Rafael del Junco pays an unsuspecting Maria Dolores a visit after he is given an emergency blood transfusion by Alberto.

The meeting of these two characters is the paramount event of the entire drama as Maria Dolores reveals to Don Rafael that Doctor Alberto Limonta, the blood donor is in fact the Del Junco heir sent to his death by his own grandfather.

This ploy prologued the drama for months in which Alberto and Cristina's love story takes a secondary role to the quest by Don Rafael's desire and his inability to tell Maria Elena that Albertico is her son.