Ji Xiaoyu, a child from a broken family, lives with her mother who suffers from occasional mental illness due to a broken relationship. The breakdown of the family made Ji Xiaoyu distrustful of anyone and insecure. Until she met the energetic Zhao Mingyue and Hu Yang, who had a bad temper and had no moral integrity in her sophomore year of high school, they were like the sun, pulling Ji Xiaoyu out of the gloomy world. Ji Xiaoyu thought they would always be warm, but who knew...