In the autumn of 1938, in a small mountain village called Mamu Chi deep in Mount Yimeng, Mother Yu and her husband Li Zhonghou were busy with the wedding of their second son Ji Cheng. Looking at the happy young couple, Mother Yu's elder daughter-in-law "Elder Sister" couldn't help thinking about the night of her own wedding years ago when her husband Ji Zhang had fled. The village loafer Nao Er came to tell everyone that soldiers were coming. Panic-stricken villagers hid in the ravines. After the soldiers left, they returned only to find that not only had the village not been plundered, but the streets had also been cleaned. Some families even found Kuai money as compensation. It turned out that it was the Eighth Route Army marching into Mount Yimeng to fight against the Japanese.