The story begins with an intern psychologist, who is studying child psychology, telling a story about a man and his six-year-old son. The father is a handsome, middle-aged man, who has come to see his supervisor, a psychologist. After his wife and kids are asleep, the father gets up and goes to the living room, but because he has worked all day, he falls asleep on the couch. When he wakes up, he finds that his son is sleepingwalked. The psychologist explains that sleepwalking is a sleep disorder that is caused by stress in the workplace or school, and that psychological counseling can be an effective treatment for this condition. He also explains that playing games with children is the first step to learning child psychology. In the beginning, the boy is shy and talkative, but he is still energetic when he spends half an afternoon playing with the toys in the psychologist's room. The boy tells the psychologist that he has a dream in which a barefoot child invites him to play with the child. The child is so dark that the boy can't see the child clearly, but the boy's eyes are so big and white that he is able to follow the child like a puppet. This dream causes the boy to sleepwalk, and the psychologist concludes that the dream is the cause of his son's sleepwalking.