The story takes place in the rapidly developing city D. The protagonists from all walks of life meet in different social classes, professional environments and interpersonal relationships. Lu Yechen was involved in a bizarre disappearance case due to depression in the workplace. Lin Qi'an gradually discovered the hidden structural mental illness in the city during psychological diagnosis and treatment. He Musen was frustrated in starting a business but unexpectedly mastered an incredible flow of information. Su Miyan's investigation of the case uncovered underground organizations and urban fog. When Wang Tianyi cracked the data, he discovered the hidden problems of urban groups. Several clues were interspersed to reveal that urban life seemed peaceful but actually concealed cracks and mysteries. In the process of searching for the truth, everyone faces the challenge of self-identity and has to find the meaning and turning point of life between reason and madness.
