The story tells the story of a collusion between Hong Kong police and criminals in 1973, under the instigation of the British, they embezzled huge profits and poisoned the citizens. The Governor of Hong Kong established the Independent Commission Against Corruption (ICAC).

Louis Koo
as Hank Chan

Tony Leung Ka-fai
as Crippled Ho

Francis Ng Chun-Yu
as Chui Lok

Gordon Lam Ka-Tung
as Nash Pak

Philip Keung Ho-Man
as Elon

Michelle Hu
as Yanni

Kent Cheng Jak-Si
as Pudgy

Jacky Cai
as Sharon

Jazz Lam Tsz-Sin
as Timmy

Mimi Kung
as Pudgy's Wife