The Badwater 135 is the most extreme foot-race on earth. The 135 mile course runs over barren desert, taking in three mountain ranges, some extremely tough terrain, and soaring temperatures of up to 130F. With the added perils of flash floods and wind storms along the way, it is a miracle that anyone is capable of finishing the gruelling course. This documentary tracks 13 of the brave, or perhaps foolhardy, runners, and runs the full gamut of human emotions with them, from joy to despair, and elation to disappointment. The participants push the limits of human endurance beyond that of most extreme sports participants, and up the ante for enthusiasts of the genre everywhere.