In August 1972, filmmaker William Greaves rented Duke Ellington House, called in every surviving giant of the Harlem Renaissance he could reach, and turned on the cameras. What he got — four hours of footage, three rooms, six-man crew splitting their attention like pinballs — sat in storage for decades, some 60,000 feet of 16mm film, waiting. His granddaughter Liani and son David finally shaped it into Once Upon a Time in Harlem, a 100-minute documentary that opened in US cinemas this month. The premise is deceptively simple: a cocktail party. But these partygoers are in their 70s and 80s, some seeing each other for the first time in half a century, and what erupts when they find each other again is the thing the film is actually about — the electricity of people who built something together, who argued about it, who watched it get misremembered, and who still care intensely. Leigh Whipper drops into his Haile Selassie monologue from Mission to Moscow. Richard B. Moore recites Claude McKay's If We Must Die from memory, on cue. James Van Der Zee demurs from the piano invitation, then lets his fingers wander anyway. The restoration alone is a story. Preservation specialist Bill Brand spent 18 months on the 1972 footage before it went to a finishing house for color correction, cleaning, and — David Greaves notes with fond candor — 'taking hair out of the gate.' The warmth and texture of the result isn't nostalgia-filter artifice; it's what careful craftsmanship looks like when it's done for keeps. The footage earned it. The film doesn't shy from the friction. Romare Bearden takes pointed exception to how artists like him were minimized in Nathan Huggins's landmark book on the Renaissance — and Huggins is standing across the room holding it. The exchange is exquisitely uncomfortable and intellectually alive. George Schuyler, who came up during the Renaissance before turning against progressivism and later the civil rights movement, is received with cold shoulders and twisted faces; one barb directed at him was cut entirely. The Renaissance, the film insists, was not a monolith. 'We were on different roads,' one partygoer says at the end, 'but all going toward the same goal.' Liani Greaves draws an analogy to her own early career — working with Tupac on Above the Rim, with Hype Williams on Biggie videos, at Brooklyn Moon Cafe in the 1990s — and it lands. Every generation is living in its Now without knowing it. What makes Once Upon a Time in Harlem valuable isn't just that it documents the Renaissance; it's that it shows what it looks like when the people who made a cultural moment are still alive enough to argue about what it meant. 'I always say this is what it looks like when your brain is not on electronics,' Liani says, watching Moore recite McKay. 'They were brilliant people.' The Greaves family's decision to keep the focus on the party — resisting William's later footage of AIDS walks, graffiti walls, and vacant faces — is the right call, and it wasn't obvious. William himself kept shooting through the 1980s and 90s, apparently unsure what the film was. Liani's read: 'he had to kind of step away in order for the film to be great.' The parallel to Symbiopsychotaxiplasm, William's 1968 meta-documentary masterpiece about a film that nearly ate itself, is not accidental. Knowing when to stop is a craft decision too. For now, the film is theatrical-only — no streaming date set, hard copies still forthcoming. The Greaves family frames this deliberately: 'We've always imagined people coming in groups, going with their family.' That's a position, not just a distribution strategy. A document this alive probably does want a room around it.