It was January 1968, a year that would be saturated in violence and historic change. Tucked away in a gray prison cafeteria in Northern California, isolated from the tumult outside, hard men doing hard time witnessed the making of a legendary album that would catapult a country singer to international stardom. Johnny Cash at Folsom Prison remains one of the greatest live albums ever made, and the man himself one of America’s greatest troubadours and advocates for prison reform. Forty years later, the album still resonates with a rawness and authenticity that few recordings have ever achieved. Cram’s film is a moving portrait of Cash as well as two inmates of Folsom who were at the show.