Ji Momo, a sophomore girl in high school who was labeled the "murderer's daughter", was isolated by her classmates due to family changes. Her best friend Chi Yuan was also expelled from school because of her.
Although the distance between them became longer, the two people's relationship became increasingly deep. Subtle changes occurred after Ji Momo transferred to another school. Chi Yuan has a new girlfriend, and Ji Momo has a new friend. Constant misunderstandings and conflicts make the two drift apart.