New York, 1872. Diviner Ada Moses is a inder of hidden things and a keeper of secrets. In her possession is a lost manuscript with the power to destroy the faith of tens of thousands of believers. When a man seeking the truth knocks at her door with a conspiracy theory on his lips and assassins at his heels, she must make a choice. Spurred by news of a ritualistic murder and the arrival of a package containing the victim's bloody shirt, Ada must either attempt to vanish with the truth or return the burden she has long borne to the prophet responsible for one of the most successful deceptions in US history. Protecting someone else's secret may save Ada's life, but is that worth forcing her own demons into the light?