Tom Petty spent 1993 and 1994 recording Wildflowers, the sprawling solo album he considered his best work, and this film builds its story out of footage shot at the time by director Martyn Atkins, footage that sat unused for decades. Director Mary Wharton cuts that 16mm studio material against present-day interviews with producer Rick Rubin, Heartbreakers Mike Campbell and Benmont Tench, and members of Petty's family, who talk through the sessions song by song. Petty himself narrates much of it in his own words, pulled from archival interviews recorded before his death in 2017. The film tracks how a double album got trimmed down for release, what got left off, and how the songs came out of a period when Petty was quietly moving away from his marriage and his band's usual sound. Studio chatter, alternate takes, and handheld footage of the band working through arrangements make up most of the runtime, with the interviews filling in what the cameras couldn't catch at the time.