London, Christmas Morning.

09:13am. Disgraced hedge fund manager Graham Poynter hides shamefully in his Belgravia mansion. All that separates him from the media hounds baying for his blood are wrought iron railings and an elite security team.

10:16am. A masked intruder stands over Poynter and his terrified family, while the last remaining security guard hangs impaled on a railing spike outside the house - a message of intent beamed to the watching world.

10:38am. Surrounding the scene are police helicopters, special forces teams, and Ed Mallory - blind hostage negotiator - who must stop this faceless adversary whose sights are set on exacting twisted retribution.