Michael Tse Tin-wah
Leung Siu Tong (Laughing Gor)
Francis Ng Chun-yu
Fok Tin Yam
Chapman To Man-Chat
Tai Chit
Bosco Wong Chung-chak
So Sing Pak (Michael)
Kara Wai Ying-hung
Sa Po Yau
Kate Tsui Tsz-Shan
Yiu Ho Ho (Paris)
Janice Man Wing-San
Carmen
Liu Kai-chi
Cheuk King Chuen
Evergreen Mak Cheung-ching
Lai Sir
Lam Suet
Kui Chuen
Jin Au-Yeung
Yeung Lap Ching
Lau Siu-ming
Ye Po
Laughing is judged guilty of murdering gang lord Michael So and is sentenced to life imprisonment. Locked up behind bars, he meets the seemingly benign inmate Fok Tin Yam, a university professor in criminal psychology who is jailed for drug possession. Highly intelligent and manipulative, Fok reveals the power of his mind games by effortlessly subduing the violent prison bully. He also deduces that Laughing is sent to the prison on an undercover mission to find out the rogue cops within the police force. The clues lead him to inmate Chit, a former sergeant from the Narcotics Bureau who has been suffering from a mental disorder. To unlock the critical information from the deranged man, Laughing must get the help of Fok, but this enigmatic figure has an agenda of his own...
