Nikki Kimball, a world-class ultramarathon runner, attempts to break the speed record on the 273-mile Long Trail in Vermont. Supported by a dedicated team of friends and family, she navigates the physical and mental toll of running over 10 marathons in length, pushing her body to its absolute limits while battling sleep deprivation and injury. This documentary captures the raw, human struggle of an athlete chasing a seemingly impossible goal, highlighting the profound connection between physical endurance and mental resilience.