Demi Moore has opened up about feelings of vulnerability during an incredibly revealing scene in her new horror movie, The Substance. The film follows a declining actress, Elizabeth Sparkle (Moore), who takes an experimental substance to reinvigorate her youth and her career. The black market drug replicates her cells, creating a younger, better version of herself (played by Margaret Qualley). The film, which recently debuted at the Cannes Film Festival, features a prolonged and explicit scene in which both versions of the actress inspect every single aspect of each other.