Documentary about white gospel, America's most enduring yet obscure musical subculture and Elvis Presley's favourite type of music. One of the foundations of country music, it taught generations of southerners the principles of harmony and produced its own legends and stars in talents such as The Louvin Brothers, Dottie Rambo and The Blackwood Brothers. A journey from the sound of ancient harmonies sung in remote country churches through to the modern fiery anthems of the religious right.