It is 1970 and Jamie Raeburn (The Janus Complex) has put his dark past behind him...or so he thinks. But a secret U.S. document passed to Ultra, a clandestine British Security Organisation, revives his nightmare. Confronted with his past Jamie joins Ultra and becomes one of the organisation's top assassins, the Archangels, carrying out a series of assassinations in Northern Ireland as the U.K. Government tries to destabilise both Nationalist and Loyalist factions. He compartmentalises his life, living as two people; Jamie Raeburn, husband and father, and Michael Messenger, State sponsored assassin, until one day he is ordered to kill a man and begins to question what he is being ordered to do. He wants to get out but no Archangel simply "leaves" Ultra. In an explosive conclusion Jamie faces an IRA execution squad, outnumbered and outmanoeuvred...and they knew he was coming. Someone wants him dead, but who...and why?