Just who are the daredevils who devote their lives to climbing the legendary walls of Yosemite? This fascinating documentary produced through the Sierra Club and narrated by Tom Brokaw aims to answer that question, profiling noteworthy climbers David Brower, Royal Robbins, Yvon Chouinard, Jim Bridwell, Lynn Hill and more. Breathtaking footage shows off a national treasure as it was meant to be seen: up close and personal.