John Hoerr tells the story of three men—his uncle, Congressman Harry Davenport, union leader Tom Quinn, and Father Charles Owen Rice—whose lives became intertwined during the anti-Communist witch hunts of the McCarthy Era. The story helps illuminate one of the more repressive periods in American history, when thousands of Americans guilty only of enlisting in leftist causes were caught up in dragnets cast by overzealous Communist hunters on behalf of the House Un-American Activities Committee and other bodies. Much has been written about well-known cultural figures (the Hollywood Ten), and prominent writers (Arthur Miller and Lillian Hellman) who contended with HUAC. Hoerr tells of mostly ordinary Americans who were largely unknown at the time, but whose stories are nonetheless remarkable.

Writing from personal experience with the title characters, as well as archival research, Hoerr recreates the events of the 1949 HUAC hearings, where rigged testimony by a few workers cast suspicion on their union brothers. The results would echo through the years, causing people to lose jobs, marriages, and self-respect. Hoerr traces the paths followed by Harry, Tom, and Father Rice and relates their individual experiences to the great conflict between anti-Communist and Communist forces in the American labor movement, leading to the eventual demise of the CIO (Congress of Industrial Organizations).