It tells the story of how, during the Anti-Japanese War, in order to take into account the overall situation of the national war of resistance, our underground party had to hide in the Shanghai Concession in the name of husband and wife with the Kuomintang intelligence personnel, fighting wits and courage, and uniting and cooperating. After "The Hidden" introduced "office politics" into spy war dramas, "The Mistaken Hidden" introduced husband and wife and family relationships into spy war dramas for the first time, and it became another topic of discussion and received good ratings. Therefore, it was hailed as the Chinese version of "Mr. and Mrs. Smith". A small accident on the Huangpu River wharf forced Lin Chufeng, an underground member of the Communist Party of China, and Yun Duo, a senior agent of the Kuomintang Military Intelligence Bureau, to hide in the name of husband and wife. At the same time, in order to meet the needs of the joint anti-Japanese war, Leng Mei, an underground party member, and Liu Fulin, a military intelligence agent, who were originally supposed to cooperate with Lin Chufeng and Yun Duo, could only take advantage of the situation and cooperate with Lin Chufeng and Yun Duo's intelligence work in the name of husband and wife. However, due to some strange circumstances, this "2.0 version" of "Hidden" became more suspenseful and confusing...