The straight-laced Inspector Chow and the psychic Inspector Lau go undercover to hunt down a serial killer targeting a group of old childhood friends.
| Actor | Role |
|---|---|
 Michael Chow Man-KinInspector Chow | Inspector Chow |
 Lau Ching-WanInspector Lau | Inspector Lau |
 Jennifer ChenChia-Yi | Chia-Yi |
 Helena Law LanLung | Lung |
 Tats Lau Yee-TatInspector Chung | Inspector Chung |
 Michael Tao Tai-YuSimon | Simon |
| EEva LaiChen Tze Chun | Chen Tze Chun |
 Cheung Kwok-KeungChen Te Kang | Chen Te Kang |
 Ronald WongLong Hair | Long Hair |
 Kingdom Yuen King-TanExcited witness | Excited witness |
 Isabel Leung Pooi-WooNot listed | Not listed |
 Cha Chuen-YeeNot listed | Not listed |
| RRico Chung Kai-CheongNot listed | Not listed |
 Sze-Ma Wah-LungBarber | Barber |
 Amy Wong Oi-MeiNot listed | Not listed |
| AAndrew YuNot listed | Not listed |
 Cub Chin Kong-HonNot listed | Not listed |
 Maryanna Yip SanNot listed | Not listed |
 John WakefieldNot listed | Not listed |
| WWan Wai-ChiNot listed | Not listed |
| BBrenda Chan Kwai-FanNot listed | Not listed |
 Sabrina Ho Pui-YiNot listed | Not listed |
 Chang Yin-TingNot listed | Not listed |
| RRay Wu Wai-ShingNot listed | Not listed |
| PPoon Ka-YeeNot listed | Not listed |