Michael Johnson is one of the greatest athletes in history. This is the story of a sporting superhero, but it is also a story about a vulnerable human being facing his own mortality. Michael Johnson believed that an Olympian knows their own body best. A finely tuned, perfectly prepared athletic superman, he smashed the opposition, obliterated world records and in winning both the 200m and the 400m did what no human has ever done. Now Michael Johnson is a stroke survivor, the body he thought he knew so well had a terrifying surprise in store for him.