In 1941, Ye Shen, the head of the intelligence department of the Japanese Kwantung Army, was a Japanese officer, the ace "Knives" of the military command, and a Soviet agent "K". No one knows that his deepest codename is the Chinese Communist Party's latent agent "Red Arrow." He is like a shadow, swirling around the four forces, using intelligence as a blade to stir up the secret war in Northeast Asia. The top-secret deployment of the Kwantung Army, the military commander's assassination instructions, and the KGB's red missions were all flowing at his fingertips. However, following the leak of a top-secret operation, all parties initiated the highest level internal review. Ye Shen must face deadly doubts from four directions at the same time in the maze weaved by himself. This is a race against time, and it is also a lonely walk that tests the limits of faith.
