The first large-scale television project depicting thirty years of underground life of the Greek Catholic Church, which was banned in the Soviet Union. The film includes unknown facts about the underground, stories of oppression and terror perpetrated by the totalitarian system. The film records dozens of vivid testimonies from priests, nuns, and laypeople who lived through those times, and features unique materials that create an unknown chronicle of the underground Ukrainian Greek Catholic Church, which was the most persecuted religious community in the world.