This film is the first large-scale television project to depict the 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 harassment and terror perpetrated by the totalitarian system. The film records dozens of living testimonies of priests, nuns, and lay people who survived those times, and finds unique materials that create an unknown chronicle of the underground Ukrainian Greek Catholic Church, which was the most persecuted religious community in the world.