The human body is designed to dispel massive amounts of heat. However, few men or women could manage to walk across a desert. Scott Jurek, on the other hand, could run across it. Jurek is an ultra-marathon runner who claims he can run for hours in the hottest places on earth. Host Tyler Harcott travels to the desert and puts his own body to the test in a running exercise. After learning how difficult this task is to complete, Harcott meets Jurek in Death Valley. Jurek demonstrates his extraordinary stamina by running in America's hottest location for 12 hours. Harcott takes Jurek to a human performance lab in order to push his abilities to the max. Harcott challenges Jurek to run for over an hour in 134 degree heat, the hottest temperature ever recorded on earth. Can he do it?