In the September 18th Incident, the Japanese artillery destroyed the young Liu Shan's home, and he died in Luodian town in the south with his wife and younger brother Si Liu. After six years of hard work, the couple rebuilt their homes and lived a stable life. As soon as Liu Si warmed up, he forgot the pain of destroying his home, refused to listen to his brother's advice, drank and gambled, and did nothing. When the Anti-Japanese War broke out, Luodian defenders built fortifications and prepared to hold on. Some people who didn't know the general trend wanted to escape. Mr. and Mrs. Liu Shan used their own experiences to promote military-civilian cooperation against the enemy and retain people in the village to support the defenders. When Si Liu was deceived by a traitor, he betrayed his country, defected to the enemy and instructed the enemy plane to bomb the target. Liu Shan saw through what had happened and understood patriotism. Si Liu refused to obey, and Liu Shan shot and killed him. Si Liu regretted his death and told us where the traitor was hiding. Under the leadership of Liu Shan, the army and the people united, wiped out the traitors and launched a fierce attack on the enemy.