Every year, 40 runners come from around the world to a small town in Tennessee to test their limits in a cult­like, quirky, and virtually impossible trail race created by the mysterious Lazarus Lake. With a secret application process, unknown start time, and a course that changes every year, the Barkley Marathons has only had 10 people finish in 25 years. Inspired by a historic prison escape gone awry, what follows is an oddly inspiring story where pain has value, failure is spectacular, and it only costs $1.60.