Kevin Michael Connolly has always dreamed of going into space, so he heads to the Johnson Space Center in Houston to see what it would take to be NASA's first legless astronaut. He takes on a rigorous, Navy Seal-style swim test, drives a lunar rover and samples space food. Then, he attempts the tricky art of spacewalking without legs with a device that frees him from gravity. His training culminates in a literally hair-raising zero-gravity flight aboard a special jet, the nearest we can come on Earth to experiencing the weightlessness of space.