The history of the air defence of Canada during the Cold War era. The reader is taken into the Top Secret world of Norad, the joint Canadian-American North American Air Defence network. Ride along with the aircrew in their cockpit as they fight an electronic joust in the skies. Go deep underground to the Command Centre as the Air Weapons controllers plot the air war on their radar screens. Visit the radar sites deep in the Canadian bush as they struggle to provide the radar data for an electronic air battle happening overhead.