In the 25th year of the Republic of China, the Shanghai beach was full of neon lights, but evil was growing in the shadows. Shen Tingbai, the chief detective of the police station who returned from studying in Germany, took procedural justice as his blade, but he was helpless before the "Case of Dismemberment of a Celebrity Actress". On the recommendation of his superiors, he was forced to join forces with Yan Qing, a mysterious consultant known as the "Human Judge" - this man is cynical, but he can penetrate the abyss of people's hearts and use gray means to point out the truth.
The two had conflicting ideas and were tit-for-tat, but in the process of solving the evaporation case of a bank secret room and the poisoning case of a charity dinner one after another, they discovered that all strange cases were caused by the secret organization "Netherworld Society". However, the blood feud of the family that Yan Qing carried and the death of his mentor that Shen Tingbai was brooding over were all closely connected with this dark force.
In troubled times, legal principles and emotions collide, and light and darkness intertwine. From testing each other to trusting each other in life and death, these two heroes used wisdom and courage as lights to peel off cocoons on the foggy Shanghai beach, vowing to uncover the monstrous conspiracy of the "Netherworld Society" and protect the last glimmer of justice in their hearts.
