Author Michael Lewis sets out on a safari through Silicon Valley to find the world's most important technology entrepreneur. This man who embodies the spirit of the coming age. It is Jim Clark who is about to create his third billion-dollar company. Clark first created Silicon Graphics then Netscape and now Healtheon. Healtheon is a startup that may turn the $1 trillion healthcare industry upside down. We also get the inside story of the battle between Netscape and Microsoft.