In the Yan Dynasty, fraud in imperial examinations was common, and the powerful monopolized official careers. Hu Moxuan, who was born into a poor family, acquired the "Cause and Effect Deduction System" through an accident - he can deduce the truth of the past through subtle clues and predict the future direction.
He won the first prize in the provincial examination by virtue of his true talent and practical knowledge, but was framed for cheating. Faced with the pressure of powerful powerful forces, Hu Moxuan did not give in. Instead, he used the system to deduce the real chain of fraud and defeated his opponents with a backhand. However, this was just the beginning - he soon discovered that a huge fraud network had already been woven in the court and in the rivers and lakes, penetrating everywhere from imperial examinations to military merit, from taxes to prisons.
Hu Moxuan vowed to tear apart this black network. But every time he goes deeper, he discovers that the power behind the scenes is far beyond imagination, and even the source of the system is related to this. He must navigate step by step amidst conspiracy traps, grievances, and court strife, clearing obstacles with iron-blooded means, and at the same time uncover the shocking secrets hidden behind the system...
