Jiang Dongjian (played by Ouyang Zhenhua), who was obsessed with pharmacological research and later disagreed with the philosophy of the institute where he was working, opened his own clinic. He was a kind-hearted person who cared about his patients. However, due to his obsession with his own research, he had not met the right person for a long time. Until he saw Fang Xiaofang (played by Yang Yi) who came to the clinic for treatment, Dongjian fell in love with Xiaofang at first sight and wanted to express his feelings to Xiaofang on the right day. Xiaofang became a nurse in Dongjian's clinic by mistake. During a driving process, Dongjian collided with another car. When his life was about to end, Dongjian pleaded with the devil he saw in his dream, hoping that he would let him go and complete his unfinished career and feelings. When he opened his eyes again, Dongjian miraculously survived. When he was diagnosed again, he met the person who came to see the doctor-it turned out to be the other party in the accident, Tai Feng (played by Lin Feng). The most surprising thing is that Tai Feng's various physiological characteristics showed that he was dead. It turned out that he had signed a contract with the devil and became a death agent. He came to seek revenge on Dongjian...