In 1937, Shanghai was filled with smoke and undercurrents. Lin Feng, an underground member of the Chinese Communist Party, used his identity as an employee of a foreign bank as a cover to deal with the Japanese military secret service, the Wang Puppet regime and the Kuomintang military command. He is like a sharp blade hidden in the darkness. With his extraordinary wisdom, calm judgment and fearless courage, he deciphers the enemy's codes, delivers key information and destroys the enemy's plot time and time again. In this war without gunpowder, he experienced the crisis of identity exposure, the grief of the sacrifice of his comrades, and the choice of emotions and beliefs. He used his own way to pave a secret path for the victory of the Anti-Japanese War, and wrote a thrilling spy war legend in the changing situation of Shanghai.
