Kim Se Hui is the chief director of a large hospital and the operator of a charity foundation. She is a highly respected doctor, but, unknown to the public, she is also the head of an illegal adoption organization that Jung Hyeon runs. Kim Se Hui holds a twisted belief that only superior genes should survive. In the case of a child who is adopted through an illegal operation and does not meet the adoptive parents' expectations, Kim Se Hui's group provides a free refund for a certain period.
When the adoptive parents return a child, Kim Se Hui's organization kills the child to destroy evidence of their crime. Kim A Hyeon was one of the refunded children, but she dramatically survived. Now, she is the leader and spiritual supporter of the surviving children. She goes up against Kim Se Hui for survival and revenge.
