In an era when war was raging across the country, the neon lights of the concession and the smoke of gunpowder in the darkness intertwined to form the most dangerous chess game. He is the "shadow" lurking in the enemy camp, walking on the edge of a knife in the name of a traitor, using commercial territory to cover up the traces of intelligence transmission, and stealing secrets under the eyes of the Japanese army and Wang Puppet; he is a sharp blade that sticks to the position, charging into battle in the hail of bullets, and using artillery fire to explain his loyalty to his faith.
Originally two parallel lives, they accidentally intertwined due to a life and death rescue. From then on, they became each other's most secret support - a code word he told at the drinking party could clear a fatal trap for him on the front line; a secret report he captured on the battlefield could help him resolve his identity crisis while lurking. When the conspiracy of the counterfeit banknote plan surfaced, and when the drawings of the Zero fighter became a must-have, one of them circled the enemy camp, and the other fought fiercely on the front line, dismantling the gears of the war machine with their flesh and blood.
The smoke blurred the face, but it could not erase the tacit understanding in the eyes. In the grief of the sacrifice of comrades and the decision to continue the mission, in the pull of the iron curtain of discipline and the friendship of life and death, the two solitary blades finally became brothers. Their story is a thrilling confrontation between spies, and it is also an iron-blooded legend of using their lives to protect each other and their country in troubled times.
