"Cavanaugh Street is a mostly quiet Armenian neighborhood in downtown Philadelphia where nearly everyone knows everyone else and certainly knows their business. But that quiet is destroyed when the Armenian Orthodox church is destroyed by a bomb and its cleric, Father Tibor Kasparian, is hospitalized as a result. What would normally be a front-page story, however, is overshadowed by another event across town, where Philadelphia Main Line society is shocked by the murder of one of their own. Anthony van Wyck Ross, the head of one of the major investment banks and a cornerstone of Main Line society, is murdered at the Around the World Harvest Ball being hosted at his mansion." Gregor Demarkian, former head of the FBI's Behavioral Sciences Unit and a longtime resident of Cavanaugh Street, is soon enmeshed in both cases. Possibly linked to the Ross murder is the never-seen conspiracy theorist Michael Harridan, who in his literature has claimed that Ross was a member of a dangerous secret ruling elite, the Illuminati. Linked to the church bombing are the anonymous threatening letters received by Father Tibor just prior to the bombing. Together - if indeed they are in some inexplicable way related - they are the most challenging cases Demarkian has ever faced.