For half a century, Peter, Paul and Mary crafted tight-knit folk harmonies while serving as influential activists. This photographic history follows the trio as they introduce America to the passionate soul of folk music, and struggle for racial equality, social justice, and peace. The group's reminiscences add further perspective on the historic 1963 March on Washington with Martin Luther King, Jr., an appearance before a half million people in 1969 to end the Vietnam War, and singing at the Hollywood Bowl for Survival Sunday in 1978.