The story takes place in the early twentieth century. In order to explore the truth of saving the country and the people, Zhou Enlai (played by Zhu Yawen), Deng Xixian (played by Zhong Qiu) and a group of progressive young people came to France to work and study. Deng Xixian was persuaded to withdraw by the school because of insufficient tuition fees. From then on, he and his partners began to work and study in a foreign country. In 1921, Zhou Enlai, Zhao Shiyan (played by Li Liang) and others established the Paris Communist Group. Inspired by them, the Chen Yannian brothers began to believe in Marxism. The Beiyang warlords stopped supplying students to study in France. Cai Hesen (played by Zhang Nianhua) took people to the French embassy to petition and was suppressed by the police. In the constant struggle, Cai Hesen and Xiang Jingyu (played by Lu Xia) became revolutionary partners, and Cai Chang (played by Wu Xiaodan) and Li Fuchun (played by Liu Zhiyang) also tied the knot. Because the University of Lyon refused to accept Chinese students who worked and studied, Zhao Shiyan, Cai Hesen and others rose up to negotiate, were arrested by the military and police, and were later repatriated. The baptism of blood made the majority of young people studying in France consciously stand under the banner of communism...