All spooks know that, in modern espionage, every action has a reaction. One wrong move could sink an entire region into turmoil - even war. Former MI5 operative Marc Dane understands this better than anyone. Dedicating your life to protecting the country means collecting enemies, and a lot of them. But for those hellbent on bringing the West to its knees, each failed plot has one common denominator: private intelligence agency The Rubicon Group, and Dane's employer. Only if Rubicon crumbles will their path truly be clear. With the clock ticking, Dane must unpick a monstrous and deadly conspiracy that stretches from the corridors of Westminster to the mountains of Mozambique. One that threatens not only Rubicon, but the lives of millions of civilians. And time is fast running out . . .