On the last day of his summer vacation, 11-year-old Ah Wah finds himself in deep water: he hasn’t finished his summer exercise. He is scared that Mr. Wong, his teacher, will report this to his parents. His mother will then find him a shame; his sister will insult him and his father will give him a beating, all of which are worse than death. After much thoughts, he finally finds a way out by getting to the root of all these: silence Mr. Wong, and before school starts!