The McPhersons from "The Demon Inside Me," and the Collins from "Do You Hear What I Hear?" come together for "My Best Friend is a Demon" as everyone deals with their demons.
Jeffrey deals with the memories of his possession. Father Matthew deals with a botched exorcism from years ago that shook his faith and strength. Jeffrey's mom and Jason's Aunt Janie must deal with a rift in their family that leaves the sisters upset with each other.
The worst, demon, though, is the one Elise made a friend with years ago. She will learn it's much harder to deal with her demons when she still enjoys its company.