Tung Tung just graduated from the police academy, encountering a Vietnamnese assassin on his first day on work. Tung in order to break through obstacle in his mind decides to join SDU. Among the teammates, Coolman feels resentment toward Tung, which he doesn't understand. Later he discovers Coolman is actually his step brother. Tung actively tries to get close to Coolman, but is rejected. When training reaches its last stage, Coolman and Tung's team reencounters the Vietnamnese assassin on a deserted island.
Daniel Chan Hiu-Tung
Julian Cheung Chi-Lam
Karen Mok Man-Wai
Annie Wu Chen-Chun
Roy Cheung Yiu-Yeung
Michael Tse Tin-Wah
Jason Chu Wing-Tong
Marianne Chan
Benny Lai Chun
Damian Lau Chung-Yan
Herman Yau
Danny Chung Ting-Yat
Jerry Lamb Hiu-Fung
Amanda Lee Wai-Man
Blackie Ko Shou-Liang
Frankie Ng Chi-Hung
Ronald Wong
Kenny Wong Tak-Ban
Samuel Leung Cheuk-Moon
Raymond Cho Wing-Lim
Sammy Leung