First of all, you need to have a solid background in the history of Argentina to understand the setting. The film expects you to know the basics of the time period and the political and military agendas in the country.
Second, the film seems to be lacking a coherent structure. The introductory scenes are not really introducing anything besides shorts of the characters we don't know, lots of names that are hard to connect and unclear motivations. Some characters look similar to each other, so you have to pay a lot of attention to be able to distinguish and them from one another and overall understand what is supposed to be going on.
Furthermore, many scenes are either unclear or misplaced, making the viewer constantly wonder why the things shown are important. They probably wanted to make a combination of a gritty detective buddy film and a pseudo-documentary, since lots of things are supposedly based on a real story. But the blend didn't go well for sure.
So when it turns out that the real story isn't that unique or interesting, the crime itself isn't that special or engaging, the poorly shot final reveal provokes no emotions and there's another reason for that. The reason (and the most glaring issue) is - the were no characterizations in the film. The characters don't reflect on what's going on, so there is no way you can get engaged in the story. They work and have minor interpersonal relations, that is pretty much all there is. I'd say that most of the scenes in the film felt like a videogame cutscene, but videogame cutscenes tend to have more interesting interactions than this film had.
Around 30 minutes of the film could've been cut, but was left in. Many scenes are way too detailed for no reason, and the pace never changed. They tried to include a sense of urgency, but there was never any tension. It just felt like someone with no prior experience wanted to make a film, but had missed all the important elements of a crime investigation thriller/pseudo-documentary.
Some of the acting and dialogue pieces were also very unconvincing, and extras in many scenes felt like they were edited in from a 80ties low-budget police detective series.
Overall, I'd say that this film was unnecessary long, not particularly interesting or engaging, lacking in characterizations and character development, structure, editing, acting and dialogue. It was forgettable, and I had gained no enjoyment from watching it.
I cannot recommend this film.
