Bianjing's Lost Dream: the Code of Along the River During the Qingming Festival

During the Xuanhe period of the Northern Song Dynasty, Zhang Zeduan painted "Along the River During the Qingming Festival", which contains the military defense map of the Northern Song Dynasty. Jin spies sneaked into Bianjing and tried to steal this painting. After the death of his master Zhang Zeduan, the apprentice Lin Mobai discovered the secrets in the painting and joined forces with the female detective Zhao Feiyan to protect state secrets.