Can an imperfect person also be the light in someone else's life? After his mother passed away, Wen Xiu (Lin Zhexi) took on the responsibility of taking care of his autistic brother Wen Guang (Li Mao). His mother's partiality and his girlfriend's lack of understanding made Wen Xiu, who was struggling in his heart, feel that he was bound by his brother. The difficult life eventually led to the conflict between the two. They were bound to each other in the name of relatives. Can they illuminate each other's lives with love?