When Andy Bowson of the Counter Terrorism Police witnesses the shooting of a suspected Jihadi, he finds himself embroiled in a violent world of politics, fanaticism and distrust. He must work quickly to confront escalating acts of terror and counter-terror, whilst finding himself confronted with an increasing number of questions. Why has his wife Sally suddenly disappeared? Who is the enigmatic 'Henry' of the intelligence service? What is the unknown force attacking the terrorists, while the government steadily loses control?
The more Bowson and his team investigate, the deeper the mystery becomes. Nothing is certain anymore and he must decide who he can trust to help him discover why a war has broken out on the streets of Britain and the authorities seemingly half-hearted in their attempts to defeat it.
Meanwhile, Sally finds herself in the midst of any increasingly strange mystery. Can she ever be reunited with her husband and does she want to be? Something ancient, lost and long forgotten has decided to involve itself in the affairs of modern Britain, but why?