In China in the 1940s, three camps were undercurrents in the sea of espionage: the Kuomintang had to deal with Japanese pirates, the underground party stubbornly shuttled behind enemy lines, and Japanese spies lurked to harvest information. Shen Fang, a humorous and cautious national security agent, was involved in a very ironic intelligence competition. When he and the equally mysterious Zhou Qing join forces in an increasingly fierce struggle, they tease each other while being surrounded by crises, and gradually develop feelings for each other. However, Ma Zi, an old friend and current military leader, is pressing closer and closer, and Jiro Ando is secretly stirring up trouble. Under a DNA suspicion, everyone exposed their shortcomings and learned the value of trust and betrayal. From Shanghai to the underground in Chongqing, and then to the occupied areas, Shen Fang and his friends broke through many difficulties with laughter and tears, and found the meaning of life amidst the hail of bullets and lies.
