An Army counterintelligence agent, Kevin Keefer, receives a mysterious letter alleging espionage in the Pentagon. He and his superiors believe the organization involved is the Joint Chiefs of Staff (JCS). There is speculation that the letter's writer is somehow connected with his father's military service in World War II. An investigation is ordered by the JCS. The FBI, CIA, and the Naval Criminal Investigative Service become engaged in the plot. Keefer suspects there is a connection between the Pentagon case and a concurrent FBI investigation in Europe. He uncovers damaging information...