In the spring of 1665, the death of a wealthy vintner and the murder of goldsmith-banker Dick Wheler unsettle London's financial community. A banking crisis already threatens the government's ability to fund war, giving powerful men reason to conceal losses and eliminate rivals.
Thomas Chaloner investigates the financiers of Cheapside while plague begins appearing in distant parts of the city. The movement of a French agent seems to carry infection between parishes, and Chaloner must unravel commercial fraud and murder as fear of disease turns every contact into a potential threat.