Xiaobai lost his memory. When he realized that he had lost his memory, he found himself being cared for in a hospital. And a few days later, when a cute but beautiful girl named Ying'er came to pick him up and told Xiaobai that she was Xiaobai's girlfriend, it made him feel extremely confused, because he really couldn't remember whether he had really been in love with this girl, and he didn't even think that he would have been in love with the girl in front of him before he lost his memory. What made him even more confused was that after losing his memory, a woman who claimed to be Teacher Xuejian always came to him in his dreams like a ghost. This made him feel scared and worried, and he felt that this was very sorry for Ying'er. Although he could not remember their love, he seemed to want to know who Teacher Xuejian was.
Xiaobai, who was taken back from the hospital, began to live a life like an isolated island. Except for the girl named Ying'er who contacted him every day, it was the teacher Xuejian in his dream who would talk to him. The time after amnesia became almost a time of complete memories, and the more beautiful and painful memories he recalled, the more unhappy he felt. When one day he finally remembered everything, he couldn't help but burst into tears.