Undercover cop, Kin, infiltrates a Hong Kong school to root out an underworld presence. Things get tricky when he falls for a charming teacher, adding a romantic twist to the fight against organized crime within the school's vibrant walls.

Alfred Cheung Kin-Tingas Inspector Hou Shui Ken
Chingmy Yau Suk-Chingas Kwan Tak Hing / Ng Siu Yuen
Sharla Cheung Manas Lam Moon Shang / Dreamy
Aaron Kwok Fu-Shingas Ace / Doggie
Richard Ng Man-Tatas Blackie Tat
Gabriel Wong Yat-Shanas Turtle
Barry Wong Ping-Yiuas Commissioner Wong
Sarah Leeas Big Sister
Michael Chan Wai-Manas Teacher Chan Wai Ha
Yen Shi-Kwanas Ti Chun Tung