SOMEONE HAS INFILTRATED the inside ring of the Secret Service—and already made an attempt on the President's life.

Joe DeMarco, a lawyer and fixer for the Speaker of the House, is asked to investigate. As witnesses and suspects around him are murdered, DeMarco embarks on a trail that twists through the Secret Service, the FBI, and the Department of Homeland Security—and snakes back to one of the most enduring mysteries of the 20th century.