"A documentary about Sacred harp singing, a haunting form of a cappella, shape-note singing with deep roots in the American south. Shape-note singing has survived over 200 years tucked away from notice in the rural deep south, where, in old country churches, singers break open The sacred harp, a 160 year old shape-note hymnal which has preserved these fiercely beautiful songs which are some of the oldest in America ... includes over 4 hours of bonus...