The idea's fairly simple, actually. It's a world about a millennium in the future where programmers are in a cutthroat competition to create, sell, and market software that runs the human body. One of these entrepreneurs, a particularly brilliant and unethical businessman named Natch, suddenly finds himself in possession of a new technology called MultiReal. Its creator claims that the software can "create alternate realities." Nobody's quite sure what that means, but it's very clear that MultiReal has the power to change the world in very fundamental (and very dangerous) ways. So the question is, can Natch hold on to MultiReal in the face of all the business rivals, government agencies and shadowy figures that come after him? Does he want to hold on to it? Will he use the power of MultiReal for selfish ends? And so on.