In 2004, journalist Dave Iverson received the same news that had been delivered to his father and older brother years earlier: He had Parkinson's disease, a degenerative neurological disorder that affects about one million Americans. In this FRONTLINE and ITVS joint production, Iverson sets off on a personal journey to explore the scientific, ethical, and political debate that surrounds Parkinson's, a disease at the center of the ongoing controversy over embryonic stem cell research. Iverson talks to scientists on the cutting edge of new cures and therapies -- not only for Parkinson's, but a number of other major neurological conditions. And he has conversations with fellow Parkinson's sufferers like actor Michael J. Fox and writer Michael Kinsley.