1945, the war in Europe came to an end, and the Asian battlefield on the eastern front turned to the last moment. In order to win the decisive battle, China, the Soviet Union and Japan launched a thrilling and life-and-death spy war on the eve of the war. The Communist Party of China (CPC)'s underground spies used their wisdom, youth and life to leave an immortal figure on the historical monument forever ... This story happened in 65438. The Soviet Union planned to go to war with Japan and began to actively prepare for the East Asian battlefield. To this end, the Soviet Strategic Service Bureau has formulated a top-secret "avalanche plan" ... the Sino-Soviet border in Manzhouli on a snowy night. A military jeep rushed out of the Soviet post and ran towards the puppet Manchukuo like a frightened elk. A few clear shots pierced the sky, and then the bullets raged. Under the cover of the Japanese army, the Soviet officers in the car finally crossed the border of death and successfully fled to Japan. The bearer claimed to be a major of the Soviet Ministry of Internal Affairs, asked to see Mrs. Sakahara, director of the Kwantung Army Intelligence Bureau, immediately, and gave a name: Gao Qiao Fu Min. Banyuan immediately ordered his men to absolutely guarantee the safety of this person and take him to his new Beijing (Changchun). It turns out that Gao Qiao Fu Min is a close friend of Sakahara, who is a Japanese spy lurking in the Soviet Union for a long time. Later discovered by the Soviet Union, he committed suicide by taking poison before being arrested. Soviet officers told Banyuan that he was Gao, the son of Gao Qiao, and Banyuan was skeptical. After repeated trials and tests, he finally accepted the fact. In fact, this man is not tall, but an agent of the Chinese Communist Party who looks exactly like him. He was ordered by the Soviet strategic intelligence department to risk his life to enter the Japanese army and carry out the top secret "avalanche plan." After gaining the trust of Banyuan, Liao Fei successfully entered the Kwantung Army Intelligence Bureau and became Banyuan's assistant. He kept sending messages to the Soviet Union. At the same time, Liao Fei's girlfriend, Zhuo Yue, was also entrusted by the Soviet Union to be sent to the Puppet Manchukuo. Her important task is to steal the defense map of the Japanese Kwantung Army and destroy the front-line Japanese fortress-Lindong fortress ... At a dance, former lovers met. Excellence didn't know Liao Fei's true identity, and immediately his grievances and sadness were deeply suppressed in his heart. When the "enemies" met, they were particularly jealous ... Soviet office of strategic services parachuted the first batch of Chinese Communist spies to fourth area, Manchuria, and soon they were all arrested. At the same time, the secret code of Liao Fei's contact with the Soviet Union and the contact place with the underground party of the Chinese Communist Party were greatly damaged. At this time, Liao Fei realized that the Soviet Union had infiltrated a Kwantung Army spy named "Snake". At the same time, the wily Banyuan began to suspect Liao Fei according to some clues, and was wary of him everywhere. Liao Fei's spy work is struggling. Liao Fei is determined to find the "snake", otherwise, he will become a great threat to the "avalanche action". The situation is extremely critical! He informed the Soviet secret service of this information in time and urged to find a spy code-named "Snake". Therefore, Japanese and Soviet intelligence agencies launched a virtual competition ... In the end, Liao Fei helped kulakov catch the snake. Zhuo Yue went to Lindong Fortress as a Japanese female translator Yoko Matsuzaka, trying to get information about the Japanese garrison. Excellence was secretly helped along the way and successfully passed the strict review of the Japanese army. Zhuoyue learned that the long-range artillery of Lindong fortress was a great threat to the Soviet Union. How can we remove this obstacle that stands in the way of the Soviet Union? Zhuo Yue learned about the death of Lindong fortress from his commander and chief engineer, Mizu, and he was very impressed with himself. With the help of China engineer Ma Deming, the fuse was replaced by a copper wire box, but it accidentally left a trace on the scene. Soon, Excellence was taken away by the gendarmerie Hermuz, and he was suddenly pushed to a desperate situation. Looking at Excellence being tortured by the gendarmerie, Liao Fei felt as if there was a thread in his heart. Before the execution, Liao Fei killed Ban Yuan, and Liao Fei and Zhuo Yue finally embraced. At the Soviet headquarters in Changchun, Zhuo Yue realized that she had been humiliated in all aspects, but this was not the core of implementing the "Avalanche Plan". This is just a clever move to divert the attention of the West ... Around the "Avalanche Plan", the intelligence war between the Soviet intelligence department, the military system of the Communist Party of China (CPC) and the Kuomintang and the Japanese intelligence department has reached a fever pitch, and a more thrilling, unfathomable and dangerous intelligence war has finally reached the darkest moment on the eve of the war. Can the giant battery of Lindong fortress, which blocks the Soviet advance, be pulled out? Who is the Japanese spy "snake" hiding Soviet agents? Can the secrets of the airport, tank positions and 600,000 troops forged by the Soviet Union be intercepted before the Japanese get them? What will happen to spies like Liao Fei and Zhuo Yue? What's the secret behind the mystery of CD? ..... When the smoke and fog of history finally dispersed, only distant memories from the depths of history were left, and everyone was just a trivial little thing in the huge shadow of war, doomed to lose. ...