Lying dormant in the UK for several years, waiting to strike, are two cells of an extremist Islamic movement. Waiting, plotting, scheming, knowing that one day the time will be right to inflict a terror attack on mainland UK that is devastating and irreversible.

Unknown to the terrorists a secret group known as ATRIUM (an acronym for Anti-Terrorist Research Infiltration and Undercover Manoeuvres) is working to stop the unthinkable from happening.

But they had all reckoned without a wealthy lone wolf who has his own intentions for what is coming to the UK mainland.