The year is 1991, and the Soviet Union is in a state of collapse. But with chaos reigning in Europe and secrets being leaked all too easily from the Ministry of Defence, why should the British Security Services be interested when the premises of a small biotech start-up are burgled, resulting in an accidental death?

Complete with suspected Russian spies and biological warfare, this peculiar case proves more complex to solve than anticipated, and truth and trust are tormented by doubt and deception as the path of the small unit of MI5 agents investigating the case is criss-crossed by innocence and subterfuge, bluff and bullying.