Anthony Walsh, Britain's leading agent in the field, is flown into London's Heathrow Airport after a horrific assassination of a British Ambassador by an IRA terrorist. This tips the already growing scale of attacks to a new and sinister level. Walsh soon learns that the Mastermind behind this new and diabolic form of terrorism is none other than Mike O'Leary, the IRA's flamboyant hit man, known as the "Irish Terror." Both men are Lords of Death, masters at the top of their forms.