A car bomb kills the wife and daughters of the Secretary of State for Northern Ireland, then a British army base is attacked. When the Irish terrorist group denies responsibility for the second blast and Bosnian war criminal, Miroslav Gradic, is spotted flying into the UK, the team realises this could be the start of a revenge campaign. Zoe is tasked to befriend a possible weak link at the Serbian Embassy - a cipher clerk - whom they suspect of sending coded messages to the war criminal.Two more hits take place on military targets in the UK, leading the Prime Minister to convene Cobra. Whilst debriefing the mole in the MOD, who's been providing information to the Serbs, they discover that it is in fact Cobra, which has been Gradic's target all along.The most powerful people in Britain will all be in the same building at the same time, and Gradic knows where they are...
