Ever since the Immortal Dao perished, no one has shone more brilliantly in the Way of Investigation than the Red Book Detective, Hou Shu. But even the best detectives will lose their purpose if there isn't any case for them to solve. That is especially true for Hou Shu, who had secluded himself among the mountains, for no case of great enough caliber could enter his gaze for the past few decades. So when the Yan Patriarch came to seek his help, he agreed to help him for a certain price, for the Yan family was one of the Seven Hegemons. Yet even he was unaware of the deep waters this case would drag them into...