The story takes place during the Anti-Japanese War. The hunting Wolf (played by Wu Qilong), Pile (played by Xie Mengwei) and Dong'er (played by Yang Tingting) happened to encounter the guerrillas and the Japanese army in the mountains. Seeing that the guerrillas were about to suffer, they quickly lent a hand, rescued Wang Ai (played by Gan Tingting), and intercepted the Japanese army's poison gas raw materials. The angry Japanese army retaliated crazily and carried out a brutal massacre on the villagers. During the battle, Wolf was injured and captured, and later escaped with the help of Dr. He (played by Ye Zuxin) of the underground party. When the captured Pile escaped from the arsenal, he took away a mute (played by Hu Yang). Unexpectedly, this person was a Japanese spy. He wanted to find the whereabouts of the poison gas raw materials through the pile. Wang Ai, who was rescued by Wolf, gradually fell in love with Wolf, but later Wang Ai was unfortunately arrested. During a mission, Wolf met Aoki (played by Zhao Huinan), the enemy who killed his father, and a momentary impulse made him fall into the tiger's mouth again...