Jiang Angtai, a young man from a mountain village nicknamed Xiaodao, was planning to marry Xiao Yiheng, the young master of the Xiaojiazhai, because his beloved girl Jiang Meilan was going to marry Xiao Yiheng, the young master of the family enemy. This ruined the wedding, triggered a family fight, and seriously injured Xiao Yiheng's father. Xiaodao was expelled from the mountain village. Later, due to the current situation, he was ordered to gather a team from the mountain village to join the National Army to fight against Japan, but was assigned to the command of his enemy Xiao Yiheng. Xiao Yiheng repeatedly pushed Xiaodao's team to the front line of the most brutal battles, but Xiaodao and his fellow soldiers fought bravely and won victory again and again. The contradiction between Xiao Yiheng and Xiaodao gradually dissipated with the baptism of war. But Xiaodao's persistent love for Xiao Yiheng's wife Jiang Meilan has always been a thorn in everyone's heart. Xiaodao even repeatedly let down the girl who truly loved him, the Communist Party member Shen Peiqin. As the war became more and more tragic, Xiaodao finally joined the Communist Party of China under the influence of Shen Peiqin. The two also came together. When Lu Han revolted, Xiaodao was ordered to win over Xiao Yiheng. After several twists and turns, Xiao Yiheng finally led his troops to revolt. A group of passionate young people performed a moving legend in that turbulent period. This play tells the tragic and tortuous historical epic of the outbreak of the Anti-Japanese War in 1937, when a group of patriotic and passionate young people in Yunnan joined the Yunnan Army, swore an oath in Kunming, hundreds of thousands of Yunnan soldiers went out for thousands of miles, fought bloody battles in Taierzhuang, and finally revolted gloriously. This play takes the historical process of the Yunnan Army's expedition to the Anti-Japanese War and the final uprising as the plot context, and the choices of the main generals of the Yunnan Army as events, telling a legendary epic of Yunnan, hoping to let the audience appreciate the historical power of rivers rushing back to the sea.