It's 1665, and the Black Death has London in its grasp. For a killer, it presents an opportunity to hide a dead body amid a city full of them. When a victim who most assuredly did not die of the plague is identified as part of the king's spy network, John Grey is called in to investigate—and above all, to locate the sensitive documents the agent had been carrying. Navigating the deadly pestilence as well, in his third outing (after A Masterpiece of Corruption), Grey uncovers an explosive conspiracy.