This drama tells the story of Wei Zhengrong and Lu Xingzhi investigating an unsolved case together. The identity of the murderer is confusing, and it is still unknown whether they can help the victims seek justice.Thirteen years ago, the girl Liu Meng was murdered. Wei Zhengrong and his apprentice Lu Xingzhi took charge of the case. They all wanted to find the real culprit and let the deceased rest in peace. However, the murderer was hidden very deep and left nothing behind after committing the crime.The traces made it difficult for Master Wei Zhengrong and his disciples to investigate.

Wei Zhengrong received a report call during the investigation. He guessed it was from the murderer. When he chased him out, he only saw Zhang Sicheng.Zhang Sicheng is highly suspected of murder, and all kinds of evidence point to him. In addition, Zhang Sicheng's son Wu Jia is also suspected of committing the crime.

The real murderers in the original work are Zhang Sicheng and Wu Jia. Zhang Sicheng's wife Bai Xiaofu was Wei Zhengrong's first love. Bai Xiaofu could never forget Wei Zhengrong. Even after marrying Zhang Sicheng, her heart remained.Falling in love with Wei Zhengrong also led to the subsequent tragedy.

Zhang Sicheng's heart is unbalanced. As a man, he certainly cannot accept his wife loving someone else. Over time, Zhang Sicheng's heart is twisted and he develops a revengeful mentality. He kills people to satisfy himself and vent his grievances.

After Bai Xiaofu died, Zhang Sicheng raised Wu Jia alone and did not commit any more crimes. Thirteen years later, Wu Jia, like Zhang Sicheng, also became a murderer. He experienced abuse with Zhang Sicheng and becamePerverse and paranoid, with violent tendencies, he imitates Zhang Sicheng and commits crimes, so both Zhang Sicheng and Wu Jia are murderers.

This is the truth in the novel. I don’t know if it has been adapted in the drama version. In short, Zhang Sicheng and his son are related to the murder case, and Bai Xiaofu’s death is also very strange. There may be some unknown secrets behind it.