It tells the story of how Luo Xi became a "dumpling girl" when she first entered college because of her experience in high school. Li Xin accidentally discovered that Luo Xi was the "heroine" who saved him. In order to help Luo Xi find her original self, a series of youth "embarrassing things" happened between them. However, there is a secret buried between the four of them. How should they choose between friendship, love and family affection?