Francisco Alcazar is a wealthy landowner, who owns sugar cane fields. Francisco is married to Sofia, a severe and uncompassionate woman, with whom he has a son named Andres. Before his marriage to Sofia, Francisco had an affair with a married woman who was physically abused by her husband. The woman became pregnant and died when the child was 3 years old. This love-child is, in fact, Francisco's true firstborn.—morroviolet

Calculating Aime sends her sister Monica to distract a love-struck smuggler, Juan del Diablo (Julio Alemán), when he threatens to reveal their affair to Aime's new rich husband. They are discovered alone together and to save Monica's virtue, Juan del Diablo promises to marry Monica.