When Jamie was nine years old, his family feared he would never walk again. Twenty years later, he set off to run 5,000 miles coast to coast across Canada. When Jamie decides to repay the hospitals in the UK that saved his life as a child, he embarks on his biggest challenge ever: running the equivalent of 200 marathons back-to-back, solo and unsupported, in -40° weather, surviving all kinds of injuries and traumas on the road and wearing through 13 pairs of trainers. And he does it all dressed as a superhero - the Flash