Shadows of Espionage in the War of Resistance

During the War of Resistance Against Japan, countless outstanding Chinese people served on the intelligence front. The protagonist, Tang Jian, and several other characters are among them. Witty and courageous, they risk their lives in a desperate struggle against the enemy on a battlefield without smoke. But the fight is brutal, and the enemy is constantly infiltrating their ranks. The clash between the two sides is fierce and merciless, and many people die on this unseen battlefield.