Harry' Harris - Thai Cave Rescuer, joint Australian of the Year - does something for fun that for the rest of us would trigger about four phobias. In near darkness and tight spaces, underwater and deep underground, he crawls through unexplored caves in what's often described as the most dangerous sport in the world. To us, that's a nightmare. To him, it's recreation. He's highly experienced, done his research, controlled for all conceivable risks, and he's completely focused. Flooded underground caves are his safe space. And the discipline involved - even the danger - leave him better prepared to manage the day-to-day stresses of life in the twenty-first century. Is he the only one who feels that way? Come on the ultimate armchair adventure with Harris while he talks with other 'risk-takers' about why they do what they do, how they prepare, and how they've handled things going wrong. Harry talks with people like climber Alex Honnold (of 'Free Solo'), sailor Jessica Watson, mountaineer James Scott, film director and deep-sea diver James Cameron, amongst many less familiar world-beaters, each of whom has a fascinating story. We meet base-jumpers, drag-racers, snipers, surfers, people adventuring from the highest of skies to the deepest of oceans. Harry's conversations give us insights into what motivates these people and why a life without risk is no life at all. He believes that by doing 'the hard things' in life you can push yourself a little further and become stronger, more courageous and resilient.