At the end of the TV series Fog of the Octagonal Pavilion, the fog of the case of 4 17 9 years ago was cleared away layer by layer. Those who were imprisoned by Ding Fulie in the air-raid shelter were discovered by Ding Fulie when they escaped from the magic cave, and were strangled alive by a rope after regaining the air-raid shelter. As for Zhu, he tried to take advantage of Nianmei in the karaoke bar that night, but was later stopped by a woman disguised as a man by Ding Radial and killed. The case was finally solved, and Nianmei and Zhu Xuan played an important role in the process of finding evidence.

As for Zu Feng, wuyue, Duan Long and Hao Lei, the family suspense online drama "Fog in the Octagonal Pavilion" is based on the mysterious murder of Xuanjia's sister Zhen Xuan more than 10 years ago, and tells the complex feelings among family members involved in the unsolved case in Jiangnan Water Town. Due to the lack of evidence at that time, the case has been shelved for many years, and the real murderer is unknown. Until a few years later, there was another murder case here and it was related to Xuanjia, which reminded everyone of the original incident again from this case. With the deepening of the investigation, the truth of the old case began to surface gradually, and finally the murderer was successfully brought to justice.