Shen Yan, a top student at Peking University, left his desk and joined the revolution. After four years of hard work in prison, he took root in Xi'an during the Anti-Japanese War and built a North China intelligence network that directly connected to the hinterland of the Kuomintang. After the Peiping Radio Station was exposed, the spies conducted a massive manhunt, the stronghold collapsed, and his comrades were captured. To protect the intelligence core, one must give up on grassroots comrades; to rescue comrades, the plan of several years will be completely reset to zero. Faith has made the most correct choice, but conscience has been burdened with shackles for a lifetime. His illustrious achievements are nameless, and only a lonely shadow remains in the history. It is difficult to evaluate his merits and demerits.
