During the Song Dynasty, Song Ci came to Changting County to take up a post, and focused on the study of autopsy in order to write the “Collected Cases of Injustice Rectified.” One night, a man and a women died at the same time, shaking up the whole county. When Song Ci heard about the case, he intervened the investigation and found that the case was very stage. While he found himself being cornered, Song Ci thought of the woman he hasn’t dared to meet for three years, the Changting County “All-rounded” Dan Qing. So Song Ci went to Dan Qing to enquire about the two recent murder cases, and asked Dan Qing to join the investigation. After a series of analysis, reasoning and visits, the truth is finally revealed....

In the early years of the Republic of China, the corrupt Qing government is overthrown by the revolution, and the trend of democratic progress rapidly sweeps across the entire land. However, aside from the chaos of the era, the underdevelopment of the people's wisdom, ignorance, and feudal superstition are still rampant throughout China. The son of the police officer Wang Zhizhang dies due to opium and he disdains the old society for the widespread crime and feudal ideology that poison the people’s minds. Hence, he disguises himself as a Taoist and infiltrates the local businessman Mr. Chen's house to investigate the opium smuggling case....

Han Peng, the commander of “Brigade Leopard”, likes to fight differently. His tactics are ever-changing. When encountering a strong enemy, he may attack and fight hard, and when it’s a weaker enemy, he may choose a soft way surprisingly. In order to hit the Reds hard and find their deficiencies and weak spots, the Blues often makes surprise strikes....

The Yunnan Public Security Border Police uncovers a major drug smuggling case and opens up a series of heart-stopping, wise-cracking "battles" to solve it. During a case, Yang Xinxin befriended and became friends with Chen Tianrui, a medical expert who was held hostage by drug dealers and nearly died. Through Chen Tianrui, Yang Xinxin also got to know Chen's cousin Liu Zhiyong. It turns out that Yang Xinxin and Liu Zhiyong had a history. When Yang Xinxin fell into the water as a child, the person who saved her was Liu Zhiyong. Yang Xinxin is grateful to Liu. However, with the further development of the case, after the police had a large number of clues, the true identity of Liu Zhiyong as a drug lord gradually surfaced. Eventually, in the face of justice, Yang Xinxin painfully chose to be "ungrateful," to battle to the end with her saviour....