Entertainment Halo Tue ,09 2424 2 months ago Last Updated : 09:30 AM ‘The Substance’: What Is Demi Moore’s Satiricial Horror Movie About? Demi Moore is the protagonist of the new horror and sci-fi movie 'The Substance.' HALO NEWSLETTER Keep reading HALO with a Free Subscription unlock this story instantly and join members and pros reading HALO daily -It's Free SIGN UP LOGIN