How hard can it be to go back to your old job? Law Yiu Wah (Moses Chan) was a teacher at a dangerous high school before he was forced to resign over a peeping Tom controversy. Wah becomes a police officer but then is asked to go back to his old high school to investigate a triad drug network at the school.

• Moses Chan Ho
• Tavia Yeung
• Linda Chung Ka-Yan
• Ron Ng Cheuk-Hai
• Queenie Chu Wai-Man
• Ram Chiang Chi-Kwong
• Law Lok-Lam
• Lee Kwok-Lun