Johnny Cash At Folsom Prison examines the most important day in the career of one of Americas foremost popular artists.  It was January 1968, a year that would be saturated in violence and historical change. Cashs 1968 concert at Folsom State Prison in California and the ensuing album became a symbol of the late 1960s and transformed his career. Drawing from rock photographer Jim Marshalls stark images of that day, rare archival footage, as well as exclusive interviews with participants and observers, the film traces Cashs rocky road that led to the concert and the torrent of stardom and political debate that came after it.