But experience has taught him to trust his instincts. When, for the first time in years, Jon runs into Lin Lifeng in a cafe in Oxford he wonders if the meeting is a coincidence. When Lin asks him to pass on a coded message, he knows it's not.

Travelling to Beijing, Jon starts to follow a tangled web in which it is hard to know who he can trust. Under the watchful eyes of an international network of spies, double-agents and politicians, all with a ruthless desire for power, Jon is in a high-stakes race to expose the truth, before it's too late.