Go Eun-byul and Lee Eun-bi are identical twins separated at birth. Eun-bi lives at Love';;s House, an orphanage in Tongyeong, South Gyeongsang Province, where the younger residents look up to her as a mother figure. Eun-Byul is a popular student at the private high school. She goes missing and returns, but she has lost her memory. She tries to find out the truth.