In the autumn of the 40th year of Jiajing, Chun'an County of Hangzhou Prefecture welcomed a special master. Yan Lou, a modern criminal policeman, accidentally traveled through time and space and became the aide of the county magistrate Zhou Mobai.
At a time when Japanese pirates were rampant and official circles were corrupt, Yan Lou relied on modern criminal investigation techniques to crack the "White Lotus Demon Case" and used economic means to resolve the county treasury deficit crisis.
He showed his outstanding talent in incidents such as rectifying illegal salt on the canal and outsmarting the Hangzhou prefect. He took advantage of the situation to enter the Zhejiang Inspectorate. As the famous anti-Japanese general Qi Jiguang was transferred to Zhejiang, Yan Lou integrated modern military concepts into the anti-Japanese war, and gradually grew from a local staff to a minister who stirred up the country's affairs.