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.
- Genre: Action, Crime, Drama
- Studio: China Star Entertainment
- Keyword: prison, prison warden, prison guard, shootout, police officer killed, massacre, police officer, suicide by cop, police uniform stolen, police officer kicked
- Cast: Nicky Wu, Takeshi Kaneshiro, Steven Hao, Anthony Wong Chau-Sang, Chan Chung-Yung, Richard Ng Man-Tat