From an early age, Kevin Pearce had become one of the America's most talented snowboarders by the time he was 17, making a name for himself for feats of breathtaking acrobatics on the half-pipe. But during a training session for the Vancouver Olympics, disaster struck - Pearce landed on his head, suffering a catastrophic brain injury. Multi-award winning filmmaker Lucy Walker takes us deep into Pearce's recovery world, and his attempt to reclaim his former life.