Republic of China: Travel Through Time and Become a Detective, but Your Boss Will Die at the Beginning

A young police officer traveled back in time to the Republic of China and became a detective. On the way to Shanghai, his boss, Deputy Director Jia Peng, who had taken the title of detective, was brutally murdered. In one day, four people died, involved in a rape case five years ago. The case becomes more and more complicated, and it seems that there is a mysterious big hand behind it, controlling the lives and deaths of others. Hu Nannan, can you find the manipulator behind it?