After the September 18th Incident, Zhou Yuan, an officer of the Northeast Army, led his troops to fight against the Japanese and found that the Japanese army had massacred the village. Zhou Yuan rescued Song Xuelan, the daughter of a hunter, from the pile of dead bodies. In 10 years, Zhou Yuan trained Song Xuelan into an excellent sniper. With her excellent marksmanship, Song Xuelan assassinated the devils and traitors, but was cruelly rounded up by the Japanese army, and Zhou Yuan was killed by the Japanese army. Underground party member Kang Hongyi secretly helped Song Xuelan escape from danger. Under Kang Hongyi's guidance, Song Xuelan assisted the guerrillas in attacking the Japanese base and avenged the massacre of the village. Song Xuelan also joined the guerrillas and devoted herself to the Anti-Japanese War.