Sheriff Liu Zhiming was accused of being involved in a rape case. After Zhou Ruobing, a young lawyer, was released from Liu Zhiming's suspicion, he kept receiving urgent calls from his sister Xu Xiaoqing. Just when Zhou Rebing decided to withdraw from the Liu Zhiming case to see Xiaoqing, Xu Xiaoqing was suddenly killed by a steel ingot tripped by the electric panel of a steel plant. The report of Dahua site irreproachable confirmed that this was an accidental industrial accident. However, under the eyes of the public, someone actually stole the white chrysanthemum that Zhou Rebing put on the dead and replaced it with a red carnation.

The mysterious appearance of this red carnation activated Zhou Ruobing's doubts, and his heart was overwhelmed by the guilt of losing his cousin. Why did the equipment director refuse to admit the equipment accident and be transferred abroad when his cousin's bones were not cold? Why did Dahua Group just submit a bankruptcy application for a 370 million acquisition project and the vice president in charge of finance absconded? Why was Zhou Rebing accused of telling the absconder when he first approached the truth of Xiaoqing's death?

In order to recover his innocence and protect his reputation, Zhou Ruobing was forced to take his respected teacher Luo Jiaping to court. At this time, the electrician Tugen found the power line corroded by sulfuric acid at the scene, which is enough to prove that Xu Xiaoqing was killed. When Zhou Ruobing and his lover Yang rushed to the scene to collect evidence, they were inexplicably protected by the Minister of Security, and the evidence that the witness was knocked down was changed. The evidence urgently released by Dahua Group showed that Xu Xiaojing died of intentional homicide with uneven distribution of spoils. This news has dealt a great blow to Zhou Rebing. His cousin who didn't take good care of herself turned out to be a spy who stole and sold business secrets. The mysterious carnation warned her in an email to be careful of a beautiful snake with a burning tongue around her. Is Yang true or false to himself? Is Xu Xiaoqing clean or dirty? Is there a problem with the bankruptcy application of the steel company? Who is the real murderer and the mastermind in this invisible murder? Although hidden carnations always give directions at critical moments, Zhou Ruobing still feels deeply afraid. It seems to be getting closer and closer to the truth, and it seems to be getting farther and farther away from the truth.