This movie's release was forbidden for several years. From the time that filming started, the Mexican government wasn't very happy about it; mainly because it presented a bad image of that administration. The filmmakers fought back, and the conflict reached the press. So the movie had to be released, to avoid rumors about political censorship.
This was the first Mexican film that showed the name of the official Party (Partido revolucionario Institucional, or P.R.I.). In past times, filmmakers had to change the name of the party to avoid the censorship.
The trivia item below may give away important plot points.
Near the end, Gloria (Leticia Huijara) gets away with the Gringo, leaving a note for her husband with the P.S. "Nos vemos en el infierno" ("I'll see you in hell"). "El Infierno" (The Hell) is another movie by Luis Estrada.