Moses Chan as Lo Yiu Wah
Tavia Yeung as Ho Miu Suet
Ron Ng as Inspector Ching Man Lik
Linda Chung as Koo Ka Lam
Law Lok Lam
Lee Kwok Lun
Total Episodes: 30 episodes
Aired Dates: April 18 to May 27, 2011
Time Slot: Mondays to Fridays, 9.30pm
Channel: Astro Channel 921
Lo Yiu Wah (Lo Sir) hails from a family of disciplined workers. He, however, is a teacher of a notorious public school. One day, he was urged to resign after his students accused him of being a peeping tom.
After resigning, Lo Sir decided to pursue his dream of being a police officer. He was instead offered to be a police undercover as the triads have expanded their network into schools. Lo Sir is reassigned back to his former school, Lam Tin Kwong.
After his return, Lo Sir meets a new teacher, Ho Miu Suet (Miss Ho), and is impressed by her passion and enthusiasm. Lo Sir also learns that he was too strict with his students in the past and tries to befriend them. Miss Ho is determined to boost her students confidence and invites bowling expert, Koo Ka Lam to coach them.
When Lo Sir finds out about Miss Koo's triad background, he decides to pursue her, hoping to get to know more about the triads. Lo Sir also finds himself in competition against the buffed Inspector Ching Man Lik, who has been assigned as the new liason officer for the school.
Inspector Ching is interested in Miss Ho, but she only has her eyes and heart for Lo Sir. Slowly the four of them, Lo Sir, Miss Ho, Miss Koo and Inspector Ching find themselves embroiled in a complicated love rectangle.