Sofía "La Negra" Bozán was an Argentine actress of vaudeville, theater, film and tango singer between 1925 and 1958. She was a true Buenos Aires star who disappeared in the middle of her career.
The granddaughter of the watchman of a theater that is going to be demolished has the dream of being a successful female singer like her mother and the son of the theater owner makes it possible.
Un cantor debutante (Pedro) y un empresario visitan el Armenonville, donde actúan Dora Reyes "La Maleva" y Márgara Campos. A Márgara la deslumbra el dinero. Pedro se enamora de ella, la invita a bailar y la defiende de Senillosa, bacán que la pretende compulsivamente. Sus amigos le auguran un mal futuro. Los cuatro comienzan una brillante temporada artística, pero Márgara se va con Senillosa y Pedro se entrega a la bebida. Senillosa y Márgara (ahora margot) no se entienden y se separan. Sin reconocerlo, Margot le da una limosna a Pedro. Con ayuda de sus amigos, éste reinicia con éxito su carrera mientras margot entra en un declive sin solución...
Anselmo works as the patron of a ranch and he is dating Elvira. One day, a visiting businessman from the city hears her sing and offers her a contract to work in Buenos Aires. She accepts and Anselmo is heartbroken.