The Great Yong Night Patrol Chronicles

Shen Yan was an ordinary modern-day office drone, formerly a criminal investigation clerk. After working himself to death from overtime, he transmigrated to the capital of the Dayong Dynasty as a poor young man. At nineteen, with both parents dead and only his gentle, soft-spoken, sickly younger sister Shen Nian left, he starts out suspected of a minor crime. With no way out, he proves his innocence and joins the Night Patrol Bureau as a temp. Using modern criminal-investigation know-how, he crushes ancient, bizarre cases. Watch as he uses his humble position to influence the greater game, maneuvering among the emperor, the feudal princes, and the great sects of the immortal clans. As a core member of the Night Patrol Bureau, he connects the imperial court, the immortal sects, and the martial world, ultimately rising to a position of great power!