In the first comprehensive documentary to chronicle the private life and public career of Joan Baez, How Sweet the Sound examines her history as a recording artist and performer as well as her remarkable journey as the conscience of a generation using interviews with David Crosby, Bob Dylan, the Reverend Jesse Jackson, Roger McGuinn and others. The film is rich with historical archival material including footage of Baez' controversial visit to North Vietnam, Martin Luther King Jr. outside a California prison, where he visited Joan to offer his support after she was jailed for protesting the draft during the Vietnam War, and never-before-seen film of Joan as a teenager performing at Club 47 in Cambridge, where her career was launched in 1958.