Dr. Shen Lang, a water conservancy doctor, died suddenly while working overtime and woke up to become a waste book in the Northern Song Dynasty. The Yellow River was about to change its course and flood three prefectures and eighteen counties, but no one believed him. Fortunately, with the [Heyue Deduction System] in hand, I can predict natural disasters, see through conspiracies, and counterattack from the Hegong who can be bullied by everyone to become the patron saint of the Song Dynasty. When the northern troops marched south, he smiled calmly: "It's just to control the floods, and to protect the country."
