Spring 1935, Shanghai. In the hazy morning, the rising sun penetrated the gray sky and barely illuminated the busy streets on both sides of the Huangpu River. Shanghai, this prosperous and mysterious city, always gives people a sense of endless fog, where hustle and bustle are intertwined with secrets, and light and darkness coexist. And in the heart of this city, there is a young woman who is using her extraordinary intelligence to wander between medicine and mystery, pursuing the truth hidden under the night.
Wu Keman, a genius at the medical school, has just returned from studying in the UK and brings everything she has learned to this ever-changing city. Her appearance is like her intelligence, cool and courageous, but also a bit cold and distant. There always seemed to be a light in her eyes that could see through everything, able to penetrate the fog and see things that others could not see.
She just received a call. On the other end of the phone was her friend Lin Guodong, the old Shanghai police detective. He said in a deep voice: "Keman, there is a case that I need your help with."
"What case?" Wu Keman's voice was cold and emotionless.
