In the autumn of the 23rd year of the Republic of China, Hangzhou. Modern criminal policeman Gu Beifeng traveled through time and became an agent of the Secret Service. He relied on solving cases while being squeezed out of the station and buried by Japanese spies. He also changed his name to Yuan Fengyan and infiltrated into the Japanese side. The black market for national treasures, the Sakura Club, and factional strife—fourteen years of spying, a solitary lamp illuminates the undercurrent of the Republic of China.
