The story takes place at a critical stage when the Anti-Japanese War was in full swing. The Wang Puppet Government surrendered to the enemy and betrayed the country. The people of China were living in dire straits, and the fate of the descendants of Yan and Huang was at stake. Ming Jing (played by Liu Mintao), the chairman of Shanghai Ming's Enterprise, was sincere and secretly funded the Communist Party of China. Her younger brother Ming Lou (played by Jin Dong) served as an agent in the Military Control Commission and his whereabouts were secretive. The younger brother of the siblings, Mingtai (played by Hu Ge), was well-read and had no interest in politics. Unexpectedly, he was kidnapped and recruited by Wang Tianfeng, a senior official of the Military Control Commission, on his way to Hong Kong. In desperation, Mingtai could only receive training incognito and eventually became an agent of the Military Control Commission stationed in Shanghai. In the following operations, he cooperated with Cheng Jinyun (played by Wang Lejun) of the CCP's anti-espionage group, and the two also developed extraordinary trust and affection in the actions. The domestic situation is changing, and these two young people will face a severe test of fate...