Mu Shengsheng, who suffers from depression, and Li Shunian, who looks bright but is actually gloomy, meet and get to know each other, but they also regard each other as their substitute for Bai Yueguang. But do they really love each other? What kind of existence is their white moonlight? Mu Shengsheng and Li Shunian battled wits and courage, and finally died alone for her Bai Yueguang...
