A rancher, tired of the damages caused to his ranch every night by the illegal immigrants crossing the border, runs afoul of the cartel and coyotes. Frustrated with his government's lack of response or willingness to deal with the issue directly, he takes things into his own hands, and attempts to disrupt the nightly immigrations.
This is a movie that will get high marks from the right-wingers and gun rights activists, and will get comparisons to "No Country For Old Men". It is not as suspenseful as "No Country...", but it is, perhaps, closer to reality and less fictitious than "No Country...". Kenny Maines and Danny Armendariz both do great jobs of being believable characters.
Whatever your political views, it's a pretty good show and worth watching, especially if you live in the western US, where you might be closer to the issue of illegal immigration.