Hard-hitting documentary on the destruction caused by the drug cartels that straddle the US — Mexico border. Yes, this type of story has been frequently told, but what makes this film particularly engrossing is its focus on two groups of vigilantes — one in Arizona battling the smugglers who cross the border and the other in an Mexican state, led by a doctor from a small town, battling the cartels and corrupt and incompetent authorities. Neither group trusts — for good reasons — their respective governments to keep them safe. (Subtitles.)