In Shanghai in 1941, Fang Jiashu, a Communist Party member lurking at No. 76 of Wang's puppet agent headquarters, was in danger of being exposed. On the other hand, Fang Jiashu also has the identity of an agent of the military command, and must maneuver in various relationships. Even in such a complicated situation, Fang Jiashu still skillfully obtained more information and benefits for our party.