In Shanghai during the Republic of China, Wen Sui, the only daughter of a wealthy Ningbo merchant family, seemed gentle and managed the family, but she was actually an underground espionage agent who had been lurking for many years. With careful thinking, she dealt with various forces, intercepted key information many times, exposed the disguise of the traitor in the wealthy family, slapped a group of pretenders who tried to encroach on the family, and guarded the bottom line of the family and the country and the glory of the family in the treacherous undercurrent of the spy war.
