Synopsis：Three years ago, the heroine's father was diagnosed with leukemia. In order to save her father, the heroine was willing to be an assistant to the doctor hero and a substitute for his lover. Three years later, the hero was going to get engaged to his lover. The heroine decided to let go of this relationship and separate, but the hero would not let her leave. She could only belong to him. The heroine got pregnant and wanted to use the umbilical cord blood to save her father. She completely cut off her relationship with the hero, and the two began a sadomasochistic relationship...