In 1928, in the old capital of Tianjin, society was in turmoil. Detective Fang Jinzhou was accidentally involved in a bizarre murder case, leading to many clues such as mysterious businessmen, underground parties, and campus revolutions. Detective writer Hui Zhilan traces real cases in a serial novel called "Blue Brick Shadow Record", and everyone is entangled with their respective identities and destinies. Ten major cases linked together the diverse aspects of the Republic of China society such as struggles between the public and the people, family grievances, and the lower classes. As the story progresses, each case is like a crack in the fog, revealing the undercurrent and truth bit by bit. In the end, everyone made choices based on their beliefs and emotions, and their attitudes and relationships with each other changed drastically. A series of seemingly unrelated cases converged into an ultimate showdown between power and justice.