Bonfire Night and St James's Park is filled with thousands of Anonymous protesters in a stand-off with the police. When a cloaked, Guido Fawkes mask-wearing body is discovered the following morning, Zain Harris and Kate Riley are called in to investigate. The corpse has been eaten away by a potentially lethal and highly contagious virus, resulting in enforced quarantine for anyone who came into contact with the body. The autopsy reveals the victim was a senior civil servant, whose work in international development involved saving lives. There is no obvious reason why anyone would want him dead. As the research team looking into the origins of the deadly virus narrow down the possibilities, first one, then another pharmacist go missing. Meanwhile, a dark truth starts to emerge about the murder victim: he was an aggressive man, whose bullying behaviour resulted in the suicide attempt of one of his former staff members, and one of his favoured charities is rumoured to be involved in human trafficking. He must have had enemies after all...The mystery is becoming increasingly complicated and with thirty lives potentially at stake, Kate and Zain have their work cut out for them. Can they find the two missing pharmacists in time, or will they too end up dead?