In 1940, the Japanese army in North China entered a concentration camp in Xingya. Chi Fang, a former intelligence officer of the military command under the pseudonym Chen Xueli, faced the knife edge of the Japanese military cryptography expert Yamamoto Yamamoto: either join the "Tamagawa Laboratory" as a lackey, or be vivisected. He chose to kneel down in front of everyone and took the bowl of white rice. From then on, he became the most despicable "model class" traitor in the concentration camp. He was scorned by his compatriots and assassinated by his comrades. But Chi Fang knew the secret. A modern military training system from the future was activated when he was about to die - late at night, the system simulated the battlefield and trained him to use leftovers to organize an intelligence network; during the day, in the name of deciphering Japanese military messages, he used the "disguise skills" rewarded by the system to fool the lie detector and pass the Eighth Route Army secret messages intercepted by Yamamoto through Lao Zhou's hand. He used tactical deductions to plan miners' riots, exchanged system points for cryptographic knowledge, and gradually raised an invisible flag in the hell on earth. Until that day, Yamamoto smiled and handed him a top-secret message - it contained the complete marching route of the main force of the Eighth Route Army. If you hand it over, tens of thousands of soldiers will be surrounded by iron walls; if you take it, all the efforts that have been hidden for three years will be wiped out. What's even more deadly is that the real mole in the Japanese army is hiding among the comrades, waiting for him to show his feet. Chi Fang pressed the send button, but he didn't know that the person who received the message - his favorite woman Lin Ruolan, had already polished the lines.
