Dick Francis whips up a fast-paced race through the risky world of horse betting. Offering little explanation, a friend thrusts some cassette tapes into Jonathan Derry's hands. But when the young man tries to play them, he realizes that instead of “Oklahoma!”, he's been given taped computer programs. Exploring the lines of code, Jonathan discovers that they can help him predict and beat any racing odds. It's not long before Jonathan is pulled...