Ai Yuyou, who was supposed to be the sole heir of the Spencer International Hotel, has been scorned by her family since she was born because she was a girl. What is even more unfortunate is that when she was 15 years old, she accidentally learned that she had congenital heart disease, and was then cruelly abandoned by her biological mother in a kindergarten. By chance, she saw a little boy who was just two years younger than her being bullied everywhere, and she resolutely stood up to protect him. An Sang-woo, who was adopted out of a kindergarten at the age of 13, became the focus of media attention overnight, declaring that he would fight to become the sole heir of the Spencer International Hotel. Unexpectedly, after he was found to have chronic myelogenous leukemia, the chairman gave up on him. An Sang-woo, who originally thought he could have a warm home, gradually felt his "worthlessness" after being abandoned twice and began a life of self-indulgence. The school's romantic history, frequent visitors to the police station, yes, his goal is revenge. When there were only 100 days left in his life, when happiness quietly came to him again, Ai Yuyou came to An Shangyu as Han Xizhen, which gradually opened An Shangyu's closed heart, but... This was the beginning of tragedy.