Yue Dong, a senior student at a prestigious university, inherited his grandfather's ability as a heavenly master. He has a humorous personality and is greedy for money but possesses unique skills. Because he "invited" a spirit to appear when he was helping his deceased grandfather cancel his account, he was misunderstood by the Security Bureau as a liar. However, he accidentally solved the disappearance of the old man by using spiritualism and became a specially appointed expert. After that, he joined hands with the hot-blooded detective Xiang Zhan and the rigorous forensic doctor Chen Jiaying to solve bizarre cases one after another and was promoted from the third-level patrol department. In the process, he used paper figures, compasses and other heavenly methods to repeatedly solve strange cases, expose gangs of human traffickers, red wanted criminals and other crimes. At the same time, he gained career and love, and eventually became a first-level patrol officer.
