Soyou was an athletic prospect, but she lost everything due to an acute heart disease. She is sentenced to death, but miraculously survives by transplanting her heart. She loses everything she has built up and returns to high school a year later than her peers, but it is not easy to find friendships or dreams. Then, in the new semester of my sophomore year, the moment I saw a boy in the classroom, my heart suddenly raced and felt like I was going to cry... The man I met in my dream that night was introduced to me as the owner of the transplanted heart and the father of the boy I saw for the first time today. isn't it? Jaeha, the son of the uncle, has lost all his family and is alone in this world. At the request of his uncle, Soyou sends a message of support to Jae-ha, and with each action, precious people are created in Soyou's empty life. reasons for life, relationships, and dreams. One by one and learning how to live is.