Everyone’s talking about The Substance today at Cannes. It premiered last night to a shocked and delighted audience and has already engendered a fascinating debate about its intentions. French writer-director Coralie Fargeat’s second film after the 2017 thriller Revenge, the explicit body-horror fable follows Demi Moore as a Jane Fonda–esque starlet named Elisabeth Sparkle, who’s being unceremoniously fired from her decadeslong position as the host of a successful daytime exercise show.