The story takes place in Shanghai from 1939 to 1942.
In 1939, Wang Jingwei defected to Japan, and the Special High School secretly sent Conan Yan back to China to lurk. Because the ship arrived at Tianjin Port one day earlier, she witnessed the tragedy after her family was wiped out. After that, she entered the military command Shanghai Station as her twin sister Conan Yi. While working for the Special High School, he is chasing the murderer.
As Caring Yan investigated and found out that the real culprit who killed her family was ordered by the Special High School, she decided not to work for the Japanese anymore.
At this time, the Wang Puppet Secret Service was established at No. 76 Daxi Road. Li Yaomin's father, Li Qinghua, served as a senior official. Li Yaomin, along with Carnegie Yan and Tang Ruoyun, whose pseudonyms were Carney Yi, joined the Wang Puppet Secret Service.
Tang Ruoyun served in the military after graduating from Whampoa Military Academy. He was the best brother of Li Yaomin, Carney Yi's ex-boyfriend, and loved Carney Yan.
Caring Yan used her special status as a conference stenographer to collect a large amount of intelligence. In the past few months, Guan Yanyan saw Wang's puppet secret service persecute the Chinese people, saw through the turmoil of the military and the benevolence of the CCP, and decided to work for the CCP to save the people from the fire.
Caring Yan successively lurked as "Chopsticks" and "Third Young Master" to find the biggest traitor Zeng Shun for the organization. After the fall of Yichang, she found the spy who betrayed the combat deployment plan, and uncovered the biggest lurker "Green Eyes" deployed by the Wang Puppet Government in Yan'an. He was used in exchange for Li Yaomin, who was disabled due to exposure.
With "green eyes" Duan Zhi returned to work in the Wang Puppet Secret Service. The Wang Puppet Secret Service in Shanghai is about to set off a spy war between the Kuomintang, the Communist Party and the Puppet...
Purpose: In the face of national war, everyone should make their own efforts