Gao Yang, whose parents both died, joined the mysterious Special Case Division because of a detective notebook called "Shadow of Crime". As a good brother, Liaozi also successfully joined with his years of lock-picking experience. In the Special Case Division, he met Lao Kun, Zhao Qingqing, and Chief Hao. As a case was solved, Gao Yang also realized that there might be a hidden reason for the death of his parents at that time.
