The eerie descended, and the rules came into being.
Hospitals, residential compounds, schools, subway stations... Every zone plunged into darkness hides deadly rules.
Gu Chen is accidentally caught up in it all, only to discover that the rules are not absolute. The true path to survival lies in details everyone else overlooks.
While others flee in terror, he calmly picks the rules apart. While others die for breaking taboos, he turns the rules against his enemies.
As one eerie instance after another is solved, Gu Chen discovers that the source of every terrifying incident points to his father, who disappeared ten years ago, and an entity soon to awaken in the darkness…
