After the April 12 Incident in 1927, the cooperation between the Kuomintang and the Communist Party broke down. Li Yaochuan, a special commissioner of Chiang Kai-shek, and Qin Shengda, the leader of the Northern Bureau of the Communist Party of China, who were once sworn brothers, returned to Shaanxi. During the purge, they parted ways and struggled between faith and family affection. Their next generation, Li Zhiyuan, Qin Huaiwen, Qin Huaiwu, Liang Dongmei, etc., were also involved in the revolutionary trend, belonging to different camps and embarking on different paths. The protagonists Li Zhiyuan and Liang Dongmei chose the path of communism, while Qin Huaiwen adhered to the Three Principles of the People. The brothers and fathers and sons staged a battle of faith between revolution and counter-revolution. The iron-blooded soldier Qin Huaiwu always looked forward to the integrity of his family and family affection. Li Zhiyuan and other Communists firmly believed in the revolution and devoted themselves to the revolution. After experiencing the baptism of revolution such as rural revolution, defending the Soviet Union, establishing bases, welcoming the Central Red Army, and the Xi'an Incident, as well as the war torrents of resistance in northwest Shanxi, defending Yan'an, and liberating the northwest, they finally ushered in a brand new New China.