“Ring of Fire” recounts June’s meteoric rise to fame with The Carter Family, considered the First Family of country music, before breaking out on her own to perform, when she would become a legend in her own right. Taking a personal look at June’s first two marriages, life with her daughters and touching relationship with her son, the movie showcases her infamous courtship with Cash and June’s heroic role in saving his life during his battles with substance abuse, as well as how her unwavering f...