Border Patrol agents, Native Americans, smugglers, ranchers, retirees and samaritans form a constellation of people engaged with the Arizona/Mexico border on a daily basis -- policing it, inhabiting it, crossing it, working it, making it safer or simply feeling its consequences. But at the center of it all is the migrant. "The Undocumented" tells the story of the migrants who die while trying to cross an unforgiving desert in search of a better life.