After working one of the worst mass killings in U.S. history, Scarpetta returns home to Cambridge, Massachusetts, when she receives an unsettling call. The body of a young woman has been discovered on the Massachusetts Institute of Technology's rugby field and physical evidence links the case to a series of uniquely weird homicides in Washington, D.C., where Scarpetta's FBI husband has been deployed to help capture a serial killer dubbed the Capital Murderer.