Very dated movie done --part of it-- as expressionistic 1930s German cinema, part as realistic 1950s European neo realism, all mixed up with a very Argentinian way of interpreting the brief and blunt dialogs throughout the whole movie.
The story is quite interesting. It could have been superbly interesting if the script could have been fully developed going deeply into the main character psychology and motives for his behavior instead of the bumpy way shown here so abruptly from one scene to the next (unless I saw a faulty copy with missing scenes).
Our tortured main character motivations for what he does, as seen in this version, is totally incomprehensible, since he has no real proof to take such a drastic measure to solve the dilemma that tortures his feverish mind.
The photography may be the best asset in this film, done in black and white with a very impressive atmosphere, dark and oppressive almost all the time.
The soundtrack is also very good, following the black mood of the story very precisely and to the point.
But the whole feeling disclosed here, either about the city, its people or our protagonists is nowadays as removed from us as a Christopher Columbus ship could be as incongruous standing next to an atomic submarine.