The USA is under siege. With chilling ruthlessness terrorist Henri Cazaux has demonstrated the vulnerability of the USA's air defences by using large commercial aircraft to drop bombs on unsuspecting major airports. When he hits San Francisco Airport the destruction of life and property is enormous. The national panic that ensues reaches all the way to the White House.

Only one man can end the chaos: Rear Admiral lan Hardcastle. Charged by the President with re-establishing security in the skies, Hardcastle must take drastic action to control the emergency - and quickly. But then Cazaux sets his sights on the biggest target of all — the nation's capital...