In 1999, in Fenyang County, Shanxi Province, the cheerful girl Shen Tao (played by Zhao Tao) was hovering between miner Liang Zi (played by Liang Jingdong) and coal mine boss Zhang Jinsheng (played by Zhang Yi). The love triangle of one woman and two men could not maintain a long-term balance. The friendship between Liang Zi and Jinsheng broke down. When Taoer got married, someone chose to go far away. In 2014, Liang Zi's health had reached an irreversible point due to long-term work in the coal mine. In the last days, he returned to his hometown with his wife and children. At this time, Shen Tao and Jinsheng had divorced, and Jinsheng took his children to live in Shanghai. When people reached middle age, they were involuntarily standing on the boundary of life and death. In 2025, Dao Le (played by Dong Zijian), who only spoke English, was very alienated from his father, but became a close friend with Chinese teacher Mia (played by Sylvia Chang). He longed to break away from his father's control and longed for "freedom" that he didn't even know what it meant.