Brewster Billings is perhaps a little too wrapped up with his computer. He has given it a pet name, Lingo. He has programmed it with the ability to talk to its owner. In fact, Lingo has begun to respond to Brewster's programming skill surprisingly well. Lingo soon makes the jump from polite conversation to elaborate requests for specific television shows to be left on throughout the day. Eventually, Billings begins to suspect that his computerized friend is surpassing him in knowledge and abilities. By the time his suspicions are confirmed, not only is Brewster Billings in trouble—the rest of the human race is, too. Lingo raises many serious questions about Artificial Intelligence-- what differentiates man from computer, and which one will control the other?