A celebration of gospel music, featuring the McCrary Sisters and Fairfield Four in performance at Nashville's Downtown Presbyterian Church, where they're joined by Robert Hamlett, Van Hunt, Amos Lee, Buddy Miller, Lucinda Williams and Lee Ann Womack. The program also features remarks from Hunt, Miller and Williams as well as Jackson Browne, Dom Flemons, Peter Guralnick, Taj Mahal, Robert Plant and Ann Powers.