Los gatos negros and A canção da Saudade were alternate - language versions of the same story. Although the plot is most likely the same in both versions, there is more information available about the Portuguese version of the film, A canção da Saudade.

Leonel is a pianist, nostalgic of sweet melodies, while his son Tony is the (real-life) leader of Os Gatos Pretos (The Black Cats), a musical group. Leonel's daughter, Cilinha, starts dating Raúl, a well-off young man, who promotes a new dancing club, the Lisboa Antiga e Moderna, where old and new music get an even share. Tony and his girlfriend Babá get engaged.

Soledad plays Babá and shows off her diverse dancing talents in this film.

This clip features some of Soledad's scenes from A canção da Saudade. For the full rock and roll sequences, click here. Below are images from these films: the Spanish poster, pictures from a Spanish magazine article, and screencaps. The man to Soledad's right in the first photo would later become her real-life husband. For more details about these movies, click here. If you have the Spanish version of this movie, or any pictures from this movie that I don't have, please contact me!