During the operation, the young agent Yin Zi and the sharpshooter A Lang met the two horse bandits Zhen Tian Lei and Zhen Tian Xiang who were injured by the Japanese army, and Su Xiaowan whose father was killed by the warlord Zhu Dafu. It tells the story of a folk patriotic organization and the underworld gangsters who shared the same hatred to fight against the invaders.