Jiang Xingjian and his four-year-old little brother' parents die in a plane crash. Their two boys have to live with their grandfather, who is the leader of a big company. The grandfather hopes that Ken (阿健) can take responsibility for the whole family, especially his little brother. He requires Ken not to tell the little brother Allcorn (阿康) about their parents' death. Ken wants to set a good example, but he is misunderstood by his grandfather because of Allcorn's faults. Under his uncle's advice, his grandfather decides to re-recognize him. While Ken is absorbed in the harmonious relationship established between him and his grandfather, Allcorn accidentally damages his precious video, taken on his birthday. He tries to repair it but fails. He is so depressed that get drunk. His grandfather decides to send him to boarding school after finding out. Ken is very upset and he climbs a tall tree. He falls, landing on a large rock, due to Allcorn's unexpected appearance. The grandfather finds the unfinished letter and has a better understanding of Ken. However, Ken is gone.