Despite the fact that he comes from a long line of disciplined workers, Law Yiu-wah (Moses Chan) is a teacher of a notorious school. One day, he was urged to resign after being vilified by his students as a peeping Tom. At present, the triads have expanded their drug network at local schools. Wah, who has turned into a cop, is told to go undercover at the school where he used to teach. At school, he is impressed by the enthusiasm of a new teacher Ho Miu-suet (Tavia Yeung). He also comes to realize he was too strict with his students in the past. With a determination to boost students’ confidence, Suet invites bowling expert Koo Ka-lam (Linda Chung) to teach bowling at the school. When Wah learns about her triad background, he decides to go after her hoping to learn more about the triads. W