The Substance Not going to go much into the plot as I think it is best to go in blind. Demi Moore is fantastic but the entire cast was as well. There are a lot of up close shots that are slowed down but mixed with high energy music that meshes perfectly. The first two thirds was very interesting and I didn't really know where it was headed. I'll add a spoiler tag to talk about the timing of the acts but there is nothing plot related.