Tommy Caldwell is the master of big wall free climbing. He's devoted the last decade of his life to opening free routes on Yosemite's El Capitan, rewriting climbing history in the process. Now he's three seasons deep into his ultimate project - the seemingly impossible Dawn Wall. Joined by bouldering specialist Kevin Jorgeson, Tommy makes his first big ground-up push, pulling pitch after pitch of 5.14 first ascents before an epic storm shuts the team down until next year.