The credits say it’s inspired by the opera Bluebeard’s Castle, and the synopsis says it’s about the “physical and spiritual aspects of a cultural recession.” The idle rich in summertime, not at all like La Cienaga.
Lara is the teenager I recognize from film stills:
The lighter-haired girl, not as recognizable from the other still where she’s walking on a second-story deck, gets a job at styrofoam factory. She escapes on a ferry at the end.
Also, there’s an octopus. Set in Buenos Aires, even Cinema Scope called it inscrutable. It’s unlike me to use the exact same images in this post which first drew me to the movie, but they’re still what stands out. The article has some good background and analysis, and this is probably worth rewatching sometime, even if I have nothing to say about it now.