American car designer Carroll Shelby and the British-born driver Ken Miles work together to battle corporate interference, the laws of physics, and their own personal demons to build a revolutionary race car for Ford Motor Company and take on the dominating race cars of Enzo Ferrari at the 24 Hours of Le Mans in France in 1966.

A documentary on the history on mankind's attempts to reach high speeds. Starting with the invention of the bicycle, going on to sports cars, cars with jet engines, rocket-powered cars, attempts to break the sound barrier, and rocket-engine airplanes. Each achievement is documented by title card indicating the speed reached in miles per hour.