A young police officer "makes a mess" of a police operation, shoots a man in self-defense, and ends up in prison. There he learns that the world isn't black and white, but has many shades of gray, and makes new friends and enemies.
| Actor | Role |
|---|---|
 Nicky WuLin | Lin |
 Takeshi KaneshiroYeung Chung | Yeung Chung |
 Steven HaoWen | Wen |
 Anthony Wong Chau-SangPrison Warden Goo | Prison Warden Goo |
 Chan Chung-YungYoong | Yoong |
 Richard Ng Man-TatUncle Da | Uncle Da |
 Jackson LiuBrother Pao | Brother Pao |
| CChiu Chi-KeungLiang | Liang |
 John Ching TungCaptain Du | Captain Du |
 Wong Yat-FeiMentally Challenged Inmate | Mentally Challenged Inmate |
| DDo Fook-PingFive | Five |
| CChen Kuang-ChienBrother Pao's Thug | Brother Pao's Thug |
 Yvonne Yung HungLin's Wife | Lin's Wife |