In a city of love and prosperity, a city of lost hope and premature death, veteran detective Hei feels it all: the hurt, the helplessness, the horror. When his father-in-law, the billionaire benefactor Kim, is gruesomely murdered in his palatial mansion, he enlists the assistance of his former partner turned private detective.
| Writing | Felix Chong | Writer |
| Directing | Andrew Lau Wai-Keung | Director |
| Writing | Alan Mak | Writer |
| Directing | Alan Mak | Director |
| Crew | Chi Shui-Tim | Pyrotechnician |
| Camera | Andrew Lau Wai-Keung | Director of Photography |
| Camera | Lai Yiu-Fai | Director of Photography |
| Production | Man Lim-Chung | Production Designer |
| Costume & Make-Up | Giorgio Armani | Costume Designer |
| Editing | Wai Chiu Chung | Editor |
| Sound | Chan Kwong-Wing | Original Music Composer |
| Crew | John Chong | Presenter |
| Crew | Don Yu Dong | Presenter |
| Sound | Kinson Tsang King-Cheung | Sound Designer |
| Sound | Kinson Tsang King-Cheung | Sound Re-Recording Mixer |
| Sound | George Lee Yiu-Keung | Sound Re-Recording Mixer |
| Sound | Davy To Burnard | Foley Recordist |
| Sound | Charles Yeung Lok-tin | Foley Recordist |
| Production | Andrew Lau Wai-Keung | Producer |
| Production | Cheung Hong-Tat | Producer |
| Directing | Wong Fei-Fei | Assistant Director |
| Directing | Lee Tat-Chiu | Action Director |
| Directing | Ask Lee | Assistant Director |
| Directing | Joe Fong Si-Hang | Assistant Director |
| Directing | Lam Shu-Yam | Script Supervisor |
| Camera | Rocky Tsang Chun-Chung | Focus Puller |
| Camera | Ho Kin-Kwong | Focus Puller |
| Camera | Ho Po-Wing | Dolly Grip |
| Lighting | Wu Tin-Yan | Gaffer |
| Lighting | Chan Sing | Best Boy Electric |
| Art | Liang Shi-Yun | Assistant Art Director |
| Art | Cheng Ho-Fung | Art Department Assistant |
| Costume & Make-Up | Damon Lau Ling-Fai | Assistant Costume Designer |
| Costume & Make-Up | Kwok Yin-Wai | Wardrobe Supervisor |
| Costume & Make-Up | Marianne Wong Ming-Pooi | Makeup & Hair |
| Costume & Make-Up | Rachel Kong Tak-Yen | Hairstylist |
| Editing | David Choi Yuk-Lam | Assistant Editor |
| Art | Jackson Wong Wai-Ming | Property Master |
| Sound | Tam Tak-Wing | Sound Mixer |
| Sound | Johnny Wan Yat-Sing | Boom Operator |
| Crew | Lorraine Hoh Lai-Seung | Production Controller |
| Crew | Ellen Cheung Man-Wing | Production Controller |
| Production | Paul Au Wai-Lun | Production Manager |
| Production | Ao Pou-Ian | Production Manager |
| Production | Yau Tsz-Kit | Assistant Production Manager |
| Production | Godfrey Leung | Assistant Production Manager |
| Production | Wave Cheung Yiu-Ho | Assistant Production Manager |
| Production | Jeannette Lee Cheuk-San | Associate Producer |
| Production | Cheung Chi-Ho | Unit Manager |
| Camera | Wong Wai-Lun | Still Photographer |
| Camera | Hung Fei | Still Photographer |
| Visual Effects | Chas Chau Chi-Shing | Visual Effects Director |
| Visual Effects | Tracy Kok Wai-Leng | Visual Effects Producer |
| Visual Effects | Otto Wong Kung-Kuen | Animation |
| Visual Effects | Hugo Kwan Cheuk-Ho | Animation |
| Visual Effects | Joe Tam | Animation |
| Visual Effects | Tong Kin-Wah | Animation |
| Visual Effects | Chow Wing-Yin | Animation |
| Visual Effects | Tsui Chun-Yu | Animation |
| Sound | Lai Chi-Hung | Dialogue Editor |
| Sound | Terry Shek Chun-Kin | Foley Editor |
| Sound | Kwong Wai-Hung | Foley |
| Sound | Tommy Yu Ka-Luk | Foley |
| Sound | Henry Yam Kwong-Heung | Foley |
| Sound | Au Chun-Wang | Foley |
| Sound | Lam Hon-Chiu | Foley |
| Sound | Lam Wai-Shun | Foley |
| Sound | Yu Chi-Man | Foley |
| Sound | Yiu Chun-Hin | Foley Editor |
| Sound | Lai Chi-Hung | ADR Recordist |
