Even when best years of director Roberto Gavaldon had pasted away, this is his way for adopting new tendencies in Mexican cinema, which topics, in 1970s, became more sexually open and tried to be critic about this and other social matters.
Alma Muriel plays Laura, a similar character to others she played later in more famous films like "Amor libre" or "Retrato de una mujer casada". The apparent stability of young and rich Laura is disturbed by her sexual attraction for handsome photographer Alex (Jaime Moreno).
People around Laura, mother and friends, feels more natural in that ambient pictured by Gavaldon sometimes liberated sometimes corrupted, and in certain manner they are the spiders trying to introduce Laura in that new (and now kind of normal) situations.
At the end, Cuando tejen las arañas, is moralist for Laura, showing risks as a punishment for experimenting with new and prohibited things, like pre-marital sex or the use of drugs.
A little slow and showing abundant nudity always from long distance, Gavaldón is not fully convinced in his style applied to this topics.