The story revolves around a serial murder case with extremely cruel techniques. Criminal police captain Gu Yan led his team, with the assistance of criminal psychology expert Shen Qing, to track the murderer step by step. As the investigation deepened, they discovered that there was a huge conspiracy hidden behind the case, involving people from all walks of life. At the same time, reporter Zhao Tianyu is also independently investigating the case and trying to reveal the truth. The forces of all parties are intertwined, and the battle between justice and evil is intensifying. In the end, can Gu Yan and his team bring the murderer to justice? How will the truth affect everyone's destiny?
