A serial killer is victimizing the city of Linghai so criminal police investigator Ji Fan , Captain Xiong Zhen Nan, and forensic doctor Zhao Qing Yan create a task force to launch an investigation. The case becomes complicated when Ji Fan realizes that the killer might be close to him and found to be related to an old case 27 years ago that leads back to his own family - his Ji Ting Shan and older brother Ji Ping who lives with him.

This it is another drama in the suspense thrillers that are part of iQIYI's Light On Theater.

In 1986, 20-year-old Chen Bao Jin came to the Altai region to find his brother who was missing in the gold rush. He was tangled between life and death in the complicated environment and was also trapped between many forces. At the same time, strange things happened one after another. After layers of uncovering, the clues all point to the mysterious place with huge treasures and no survivors—Sister Sea. He struggled with people and nature, and finally discovered the mysterious "Well No. 7“ in the Sister Sea, and found the truth about the disappearance of his brother. He then realizes bravery and kindness are the greatest treasures of mankind. Adapted from the novel "1986 Tao Jin Jing Hun" (1986淘金惊魂) by Lai Er (来耳).