Ruan Liuzheng (played by Wang Churan) returned to the city where she grew up seven years after leaving home and became a trainee doctor in the Department of Neurosurgery at Beiya Hospital. In order to stay in Beiya, Ruan Liuzheng devoted all her energy to her work. The embarrassing thing is that her ex-husband Ning Zhiqian (played by Peng Guanying) is the best neurosurgeon in Beiya. He took the initiative to be Ruan Liuzheng's mentor and taught her everything, just to make up for the damage caused to her by her failed marriage. However, Ruan Liuzheng is no longer the fragile and timid girl she was back then. Whether it is treating diseases and saving lives or facing emotions, she has her own responsibilities and persistence. At work, they argued, reconciled, and fought side by side, and the red line that fate had tied between the two of them had never been cut off. In response to the country's call, they joined the medical aid team to Africa. In the process of rescuing patients, Ning Zhiqian was seriously injured by a stray bullet. Ruan Liuzheng never gave up and snatched him back from the hands of death. After experiencing the test of life and death, they have a better understanding of life and life, and started a new relationship again.