Su Wanyun, the proprietress of Shanghai Bund Cloth Shop, was pursued and married by the mysterious wealthy businessman Lu Huaijin because she looked exactly like the late movie star. In the third year after her marriage, she gradually discovered that behind her husband's mysterious whereabouts late at night, the telegraph machine in the secret room of the study, and her striking resemblance to her "dead ex-wife", there was a well-planned espionage scam. When her true identity - "Bai Ge", an underground intelligence agent of the Communist Party, was forced to surface, this marriage, which started as a substitute and fell into true love, became the most thrilling psychological game battlefield between the Kuomintang, Communist Party and Japanese spies on the isolated island of Shanghai.
