The conceit is that the film is examining a 20-year-old cold case by auditioning local people to play the roles of the protagonists: JonBenét, the victim; her parents, Patsy and John; her brother Burke; a local Santa Claus, who attended a party at the Ramsey house the night before the murder, and so on.
The body of six-year-old JonBenét was discovered, covered in her favourite blanket, on the morning of December 26th 1996.
The body was in the basement of her home in Boulder, Colorado; her skull had been broken by a forceful blow and there were deep ligature marks around her neck.
The participants—and, no doubt, many of the viewers—have picked over the evidence as presented in countless think-pieces, articles and conspiracy theory forums, and built up their own beliefs.
In the film’s dramatic and moving final set-piece, cameras pan through a set populated with Patsies, Johns, Burkes and mysterious intruders, all acting out a dysfunctional ballet of possible scenarios, each moving inexorably towards one thing: the death of JonBenét Ramsey.