In a desperate struggle, the Kuomintang reactionaries decided to turn the Montenegro area of Southwest China into a no-man's land, secretly build concentration camps for holding senior political prisoners across the country, and implement the so-called "Project 07." To this end, the enemy began to encircle and suppress our Montenegrin guerrillas. In order to smash the enemy's plot, the Jiangcheng Special Committee of the Communist Party of China sent a special military instructor Bai Bin and radio operator Xue Fei to the guerrillas. On the way, they encountered the enemy and were unfortunately arrested. Lei Ming, the head of the enemy's intelligence department, tortured Bai Bin and Xue Fei and coerced him for confessions. Gu Yun, an underground worker of the Communist Party of China in the enemy's spy agency, used her role as a typist to secretly observe the situation of the arrested comrades. One day, Gu Yun found Bai Bin's confession material while typing. She immediately handed the information to Lao Yang, the liaison of the underground party, and forwarded it to the guerrillas. Bai Bin and Xue Fei were suddenly taken into a car and drove to another place. On the way, the driver, He Cheng, killed the escorting soldier and claimed to be the liaison officers of the underground party. The crowd shook off the enemy pursuers and returned to the guerrillas. At night, the enemy quietly entered the mountain village and attacked a branch meeting held by the underground party. Li Qing, the political commissar of the guerrillas, was unfortunately arrested to cover the evacuation of his comrades. At the instigation of Xue Fei, guerrilla captain He Daming led the third team to ambush in the river valley, preparing to rescue Li Qing, but he walked into the enemy ambush...
