A passenger aircraft heads towards London; it has a bomb on board. In the city, members of Islamic State have placed a dirty bomb at a strategic London location. Their plan is for the aircraft to crash into central London to combine with the detonation of the dirty bomb. It means the destruction of London is about to begin.
The Islamic State has secreted thousands of battle-hardened IS soldiers into Europe, hidden amongst the flood of refugees and migrants, so that they can spread their Jihad. They are going to do battle and attack the non-believers with the aim of total domination through their radical form of Islam.
Grenville Makepeace runs the MI6 Middle East anti-terrorist section but has to take a cautious line because there are those who ignore the terrorist threat already embedded in the corridors of power. Those responsible for safeguarding the country from attack are being challenged, so he turns to the Excalibur Foundation for help. They in turn look to Dan Pierce, a former French Foreign Legion sniper, and his reporter associate, Katie Jackson, to cut the head off the IS snake
