A young genius with an 8-year-old mentality suddenly becomes head of a Hong Kong triad.
Andy Lau
Wong Kau-Tai
Aaron Kwok Fu-Shing
Chung
Rosamund Kwan Chi-Lam
Chi Lam
Richard Ng Man-Tat
Seven and Half Taels
Sandra Ng Kwan-Yu
7.5 Tael's daughter
Danny Poon Wang-Ban
Hou Tin
Yuen Woo-ping
Master Dragon
Spencer Lam Seung-Yi
Superintendent Lam
Vindy Chan Wai-Yee
Chi Lam's sister
Lawrence Cheng Tan-Shui
Store Manager
Jeffrey Lau Chun-Wai
Uncle 8 Taels
Sam Wong Ming-Sing
Dion Lam
Adam Chan Chung-Tai
