Borges falls in love with Beatriz Viterbo, a high-class young woman, who decides to marry a government official who makes Borges strongly suspect him, speculating that he is a sadist who is slowly poisoning Beatriz. To save Beatriz Borges, he decides to turn to a detective, who becomes the hinge of an unthinkable story.
Emilia, an imaginative young woman from a small town, goes to Buenos Aires in search of her missing sister. The clues take her to Andrés, a mysterious man who may have led her sister astray.