During the 19th century, the forces of modernity challenged traditional faith and drove a wedge between liberal and conservative believers. "A Nation Reborn" explores slavery, and how it splits the nation as abolitionists and slaveholders find justification in the Bible. Frederick Douglass condemns Christianity; President Lincoln struggles to make sense of the war's carnage and the death of his young son. Lincoln, who previously had favored reason over revelation, embarks on a spiritual journey that transforms his ideas about God and the Civil War's ultimate meaning.

"Soul of a Nation" explores the post-World War II era, when rising evangelist, Billy Graham, tried to inspire a religious revival that fused faith with patriotism in a Cold War battle with "Godless Communism." As Americans flocked in record numbers to houses of worship, non-believers and religious minorities appealed to the U.S. Supreme Court to test the constitutionality of religious expression in public schools. Civil rights leader Martin Luther King Jr. emerged as a modern-day prophet calling upon the nation to honor both biblical teachings and the founders' democratic ideals of equal justice.