In a turbulent era, Lu Chenzhou, an assistant professor at Peking University, is actually a hidden agent. Using the podium as a shield, he used ancient books to convey information, built an intelligence network under the supervision of secret agents, traced the truth about the annihilation of the family, and outsmarted the irrefutable evidence of the Japanese invasion of China, toxin samples and code books. In dealing with Fang Jianing, who had a complicated identity, he used his resourcefulness and faith to break through numerous obstacles and complete arduous tasks again and again, adhering to the original intention of "history cannot be tampered with" in the darkness.
