The story revolves around a mysterious entity known as the "Nightmare Taker," a malevolent being that feeds on the darkest fears and traumas of individuals. Those who are unfortunate enough to cross paths with this entity are forced to confront their deepest, most terrifying nightmares. As the series progresses, it becomes clear that the Nightmare Taker is not just a monster, but a manifestation of the collective unconscious, preying on those who have been unable to overcome their past traumas.