Senator Frank Church of Idaho was a scathing critic of what he saw as American imperialism. He would show historic strength in his greatest moment, when in the wake of Watergate he was tasked with investigating abuses of power in the intelligence community. The dark truths Church exposed would shake the nation to its core. Drawing upon interviews, documents, and unpublished letters, notes, and memoirs, Pulitzer Prize-winning reporter James Risen tells the gripping story of truth and integrity standing against unchecked power - and winning.