The story revolves around agents of an organization who were bound to protect the ordinary humans from the demons who seek the ruin of humanity. In this story, a powerful nightmare spirit -most commonly known as the Incubus- managed to escape from its prison in the Dream World.

Now it is causing utter chaos and even lead to some killings and fights in between married- or even unmarried- couples. Hoya, along with the best agents from the organization's other branches, were tasked to capture the said demon. But it was not an easy feat seeing as the only thing that could defeat the Incubus is a Dream Guard, the last of which died two decades ago. They were almost convinced they can't defeat the demon.

That is until Woohyun's life was put in jeopardy and Hoya's real identity revealed itself- which he wasn't aware of in the first place.

Definition of Terms: (already included in the story)

Black Order: an organization composed of humans with conscious control of their Psychic powers. Their existence is a secret to ordinary humans. They protect the humankind from all kinds of demon attacks.

Officials: agents with administrative skills. They're the strategists of the Organization. Brainy with above average Psychic power but not skilled in combats

Guards: agents who secure the Gates of the Underworld. They have an average psychic power and combat skills. Mostly accompanies the Officials

Dark Knights: agents with high psychic power and best at combat. They were mostlt sent on missions to defeat demon escapees

Dream Guard: a special type of agent; rare. Only exists if a Dark Knight conceived from the Incubus; also the only one capable of defeating the said demon. Can alternate between dream and reality

Incubus: a nightmare spirit who feeds on the energy especially fear of the humans; humans- male or female; can annihilate the human population if not stopped

Dream Baby: a demon born from an ordinary human who's by the Incubus; turns reality to dreams just like it's ascendant; uses its tongue to eat reality and poops it as fragment of dream