The story tells that the subtle relationship between the teenager in the rebellious period and his mother left him at a loss. The love between the mother and the child in the family is difficult to express. One day, after being bullied outside, the teenager hurried back home with his tired and injured body, only to find that his mother did not keep her appointment to go home for his birthday, leaving him alone. Memories and sad emotions poured into his thoughts. The story takes "dinner" as a clue, revolves around the doubts of dinner, and slowly uncovers the mystery. It uses many metaphorical techniques to tell things other than the story. The end of the story also uses a reversed open ending, which is reasonable and unexpected.