The story takes place in Dragon City in the near future.
An invisible disaster called "cognitive pollution" has quietly arrived. It distorts the physical rules of a specific area and forms an abnormal zone called the "Secret Realm of Rules."
The official organization "Night Watch" blocked the news and secretly recruited "qualified people" with natural resistance to pollution to deal with it.
The protagonist accidentally gets involved and finds himself in the most dangerous secret place of rules in Dragon City - the Abyss Hospital.
