In October 1937, on the occasion of the all-out War of Resistance Against Japanese Aggression, a case occurred in Yan'an where Huang Kegong (played by Wang Kai), the captain of the sixth team of the Anti-Japanese Military and Political University, shot and killed a young woman due to forced marriage. The murderer Huang Kegong is the commander of the Red Army, and the victim is Liu Qian (played by Ma Weiwei), a 16-year-old young woman who defected to Yan'an in Taiyuan to participate in the revolution. How to judge Huang Kegong? The Shaanxi-Gansu-Ningbo Border District High Court, which has only been established for two months, is not there, and the heavy responsibility falls to the chief judge Lei Jingtian (played by Cheng Taishen). Lei Jingtian participated in the Nanchang Uprising, the Guangzhou Uprising, and the Baise Uprising, and walked the Long March with Huang Kegong. Red Army judges had to try Red Army generals, and the humble border district courts had never experienced such a big case. Mao Zedong (played by Huang Haibing), He Zizhen (played by Dai Jiang), Zhang Wentian (played by Zhang Jie), and Hu Yaobang (played by Mao Child) are all inevitably involved in this case. In the face of public opinion at home and abroad, in the face of the angry students and people, and in the face of the pleas of the old Red Army, Lei Jingtian withstood the pressure of all sides and tried the case by means of an open trial and a democratic verdict. On the playground of the Northern Shaanxi Public School, more than 2,000 people participated, Hu Yaobang spoke on behalf of the prosecutor, 12 representatives of the masses spoke, Huang Kegong debated in court, and finally the five members of the trial court launched a fierce debate...... Huang Kegong had been waiting for Chairman Mao's amnesty order, and finally Mao Zedong's reply came, which was read at the conference, and he was in favor of punishing Huang Kegong to death, but did not pardon him.