While studying at a Catholic boarding school, the young Luisa meets a boy, Julio, who talks to her from the street and through the gate. However, the girl's arrogant older brother removes her from the establishment and takes her to live in her family house. The beginning of love between Luisa and Julio is made even more difficult by what seems to be the beginning of a disease in her.

En la década de 1930, la joven Luisita debe irse lejos de su amado Julio tras contraer tuberculosis. Ya curada, cuando regresa descubre que algo en él ha cambiado y se ve implicada en un crimen. Canciones y diálogos arman la trama.