Gu Bai has lived in a mental hospital since he was a child, a hospital run by his own family. He told everyone that he had a twin brother and a twin sister. Others laughed at him for being stupid and felt sorry for his loneliness. Only the bearded ZERO asked Gu Bai, how do you know, you have never seen him. Gu Bai said, how could I not know? My brother and sister and I came into this world hand in hand and grew up together. But one day when I opened my eyes, they were gone. Someone took them away while I was crying.
Big Beard looked at Gu Bai's serious little face and said, I will help you find a brother and sister. When you grow up, you can help me untie a knot in my heart, okay?
Gu Bai agreed and even hooked up with the bearded man.
Fifteen years later, in a private psychological clinic in Ping'an County, Gu Bai acted in a play to fulfill the bearded man's wish.