"Aventurera" has a good plot, but unfortunately the script was so watered down that all of its edginess is gone and what's left doesn't exactly make much sense. I assume it's because Mexican censors of the day wouldn't allow the film to be as explicit as it needed to be-- hence it comes off as a bit of a letdown. So, in many ways it is reminiscent of a post-code Hollywood picture--gutted of its sexuality and sordidness.
When the film begins, Elena is a happy young woman and her life seems wonderful. However, soon everything is in shambles and she's fighting to keep herself alive. It all begins when Elena's mother takes off with another man. The father, in his grief, commits suicide! Suddenly, Elena is forced to fend for herself and she cannot find a job. A 'friend' offers to help her and after he gives her some adulterated champagne, she awakens to find herself in captivity--forced to work for an evil lady.
At this point, you assume Elena is going to be a prostitute--and it looks as if that is what the film WANTS to say. However, this 'debased life' involves being forced to sing at a nightclub!!!! Huh?! Does this make sense?! Nah. They really are attempting, in a very clumsy way, to imply she's a prostitute and sleeps with customers--though you never see anything remotely like this and it's obviously a case of over-sanitizing the plot.
What follows is a plot by Elena not only to escape from her boss but to ruin her. The idea of this is great. But, like the whole prostitution angle, the film avoids the gritty angle and wimps out twice. First, the evil slasher Rengo inexplicably does NOT kill or disfigure Elena when he's ordered to but instead becomes her evil guardian angel. Why? I have absolutely NO idea. Second, after carrying out her plan to destroy the woman, Elena gets cold feet and backs off from her plan to ruin the 'lady' and her son. Why? Again, I just don't know!
Overall, this could have been a gritty and exciting film. Had it been made in France at the same time, it would have been dark and much less sanitized. While this is supposed to be one of Mexico's better films of the era, I just found it all to be a boring mess which again and again failed to capitalize on a decent story idea.