This is a story of suspense and reasoning, and also a story of love at first sight. The story takes place in Jinghai, a first-tier city with a population of tens of millions. The protagonist Yun Ruoyu is an excellent psychiatrist, a psychoanalyst and psychotherapist specially hired by the police station. She tells you from her own experience that it only takes one second to love someone, and it only takes one moment to trust someone. In this story, the appearance of two people completely changed Ruoyu's life trajectory. One is Cong Xihou, the person she loves; the other is Lin He, a perverted serial killer and her psychotherapy target. Cong Xihou was cheerful, enthusiastic, uninhibited, simple and innocent, and his confidence and nobility deeply attracted Ruoyu. Ruoyu finally learned that Empress Xi was obsessed with her and that she actually came from thousands of miles away to find her. Cong Xihou also loved Ruoyu deeply. He felt peaceful, quiet, tolerant and wise where Ruoyu was. It was a place where his soul could rest gently. After several disasters, Ruoyu and Xihou finally came together. However, the appearance of Lin He caused Ruoyu's professional self-confidence to completely collapse, and she finally decided to give up her favorite career as a psychiatrist. The reason for this is left to the readers to understand.