"Monsters" is a poorly titled film about aliens that inhabit the "infected zone" of northern Mexico. This area, all along the border of United States and Mexico, extends south for a hundred miles or so, and not coincidentally, cohabits the same space that is presently contaminated by Mexican drug cartels. Not a word is spoken of the latter, because "Monsters" is set in contemporary America, six years after a NASA probe, having examined a meteor believed to hold extraterrestrial life, falls back to the earth on its return and spreads its payload across this "infected zone." In the six years succeeding, the aliens have reproduced and established domain over the entire area.
The narrative follows a photojournalist who is given the initially unenviable assignment of escorting his publisher's daughter from somewhere around Mexico City to the eastern coast of Mexico, where she is expected to take a boat by the Gulf of Mexico to the United States. Of course, the daughter turns out to be very beautiful, albeit avoiding the return that will reunite her with her fiancé (the reason for this is never explained). The trip turns out to be more complicated than it should and, as you might expect, rather than going around the "infected zone," they must go through it.
But the point is not the reality or irreality of the creatures, but the concept of the "infected zone." Both the American and Mexican military are struggling to control the zone, and are apparently failing therein. At the beginning of the film, by way of introduction to the "monsters", we see one attack a city outside of the southern border of the zone, and at the end, we learn that they have broken through the US border. In the zone, the two main characters are escorted by armed men who look like guerillas. The latter turn out to be a sympathetic group, who are essentially the residents of this zone. They must wear gas masks at times, to protect themselves from the gases spread by American planes. They are eventually victims of the creatures they attempt to avoid. When the protagonists approach at the US border, they first spy it from the top of what looks like a Mayan temple. From this vantage point, they are able to see its enormity: it is a fortified concrete wall, hundreds of feet tall and extending, presumably, from the Gulf of Mexico to the Pacific Ocean (see photo below). The protagonists enter through one abandoned checkpoint--a surprising state of affairs, indicating that the borders have been breached.
The latter moment is to me an unquestionable reference to the famous scene in "Apocalypse Now" where Robert Duvall's character spearheads an invasion into Vietnamese territory with speakers attached to his helicopters playing this song (and that image recalls one from the beginning of Riefenstahl's "Triumph of the Will", as Hitler's airplane descends on Nuremburg from the heavens to a Wagnerian accompaniment).
To me what is interesting about this film is the way in which it speaks about something that it does not think it is speaking about. The filmmaker, in a featurette online, spoke about the plausibility of extraterrestrial life, particularly in the backstory for the film, that the NASA probe had visited Europa, one of the moons of Jupiter, and one of the few known bodies with sufficient water for life to occur. Yet the issue is the "infected zone," not even the extraterrestrials. They are incidental, represent the threat, but are not meaningful in themselves.
The "infected zone" cohabits the space where, presently, a devastating drug war is unfolding and nothing can seem to stop it. One might imagine a component of this film describing how the "infected zone" became what it is: that is, how the aliens were discovered and how it was evacuated of the human life that is found there now. Would that story countenance narcoterrorism, and describe its eradication by the aliens? That story would be the imaginative solution to the current social-political problem. But it would leave Mexicans economically destitute (as portrayed in the film) and involve an American police state.
Yet nary a word is spoken of immigration (in one of the trailers, the words are telegraphed between montages "they arrived six years ago ... they were aliens ... now they are residents") or narcoterrorism. The guerillas are the closest representation of the drug war or the immigration (in addition to the protagonists, they are escorting several Mexican families to the border).