While evacuating during the 2025 Palisades fires, Tamra Davis found tapes she had recorded three decades earlier on Australia’s Summersault tour. Through stage-side footage, backstage moments and interviews by Kathleen Hanna, "The Best Summer" brings together Beastie Boys, Sonic Youth, Foo Fighters, Beck, Pavement and Bikini Kill, recovering a moment of youth, friendship and creativity in alternative music.