The army is at the city gates.

During the Liberation War period, in a certain city in Northeast China. Zheng Hancheng (played by Zhong Shuhuang) was released by our army and upon returning to the city was suspected by the 203rd division of Jiang's direct line. Even his commander, Zhao Chongwu (played by He Haiquan) of the 369th division, got involved. To undermine the enemy, our army's Minister Jiang (played by Li Moran) infiltrated the enemy's stronghold and mobilized Zhao to lead a rebellion. Zhao hesitated, and at this moment, the chief of staff of the 203rd division, Qian Xiaozheng (played by Zhang Ran), discovered Zhao's connection with the Communists and attempted to arrest Jiang, but Zhao schemed to send him back instead. Soon, Hu Gaocan (played by Wang Qiuying) from Nanjing came to inspect the defense and also noticed Zhao's unorthodox thoughts. He pretended to offer comfort while secretly sending people to investigate evidence of Zhao's collusion with the Communists. During a breakout, Zhao led the 369th division in the vanguard but injured his arm. Accidentally, he discovered a confidential telegram from Chiang Kai-shek ordering his execution. Zhao no longer harbored any illusions about Chiang and decided to turn against him. He secretly contacted Minister Jiang and decided to stage a rebellion on the battlefield...