The female protagonist wanted to misunderstand the male protagonist. Specifically, there was something about the male protagonist's previous job. The male protagonist used to be a doctor. For some reason, the female protagonist learned that there were some problems in the hospital where the male protagonist used to work. She did not know the specific details, but the female protagonist thought that the male protagonist had flaws in his previous work, so she was dissatisfied and prejudiced against the male protagonist. When the female protagonist suffers from leukemia and needs bone marrow donation, the male protagonist becomes her attending doctor and decides to donate bone marrow to the female protagonist. However, due to the previous conflict, the female protagonist did not really trust the male protagonist. Therefore, when the male protagonist donated bone marrow to her, she felt uneasy and confused, thinking that she did not really need the bone marrow, so she refused the male protagonist's donation. The female protagonist's rejection made the male protagonist feel disappointed and heartbroken. He knew the female protagonist's illness and how important it was for the female protagonist to donate bone marrow. However, the male lead did not give up. He continued to try to communicate with the female lead, hoping that she would understand him. In the end, the male protagonist made the female protagonist realize her mistakes in various ways. The female protagonist gradually put down her misunderstanding and prejudice against the male protagonist and began to receive treatment, which achieved good results.