Samuel, or as he preferred to be called, Sam, was just a normal teenage guy who goes to school (prison) and watches My Little Pony. He then goes to bed and has a dream of being a pony and living in Ponyville, but little does he know his dream is about to become real when it gets invaded by a dream demon.

Two centuries ago, a demon known as, Nightmare, enters people's dreams and ruins it without their consent. Witnesses report the demon drags their physical body into the dream world through a portal. This makes it so that the demon can make their greatest fears into a reality, meaning it will not only damage the victims mentally, but also physically. Nightmare was then finally sealed away; however, it was only temporary, and he reawakens in a very weakened state after two hundred years. Nightmare must find a host to keep himself alive but who?