Du Di and Wu Congrui are both residents in the Department of Obstetrics and Gynecology of Shengji Hospital, one of the top three hospitals in China. The two friends originally had a bright career prospect and a stable emotional relationship. However, the election of this year's chief resident physician disrupted their originally orderly lives. Because there is only one vacancy, Du Di and Wu Congrui had to start competing. Under the leadership of chief physician Huang Yunling and attending physician Lin Wei, the two treated various patients and witnessed all kinds of strange life. Among these patients were strangers who had never met, relatives and friends around them, and Du Di's mother, who was in poor health but still wanted to have another child. The two collaborated in competition and competed in collaboration. In addition, Du Di and Liu Nianbai, who returned to China to investigate the truth of his mother's death, gradually approached each other in their daily bickering, and Wu Congrui and Li Junxiao also experienced an emotional stage from wanting to love but not daring to love, not being able to love because of misunderstandings, to being brave to be together. In the end, everyone got the life they wanted and realized everyone's "rebirth".