On the first day of April 2004, a rumour emerges that Hong Kong's most influential triad organization is planning to assassinate the new Commissioner of Police, who will take charge in 30 days. Three unrelated policemen, Fung Chi Wai (Criminal Investigation Division), Wong Ka Fai (chief of Criminal Investigation Bureau) and undercover Yeung Kai Dong find themselves implicated.
Alex Fong Chung-Sun
Yoyo Mung Ka-Wai
Kevin Cheng Ka-Wing
Marco Ngai Chun-Git
Patrick Tam Yiu-Man
Sririta Jensen
Chatchai Plengpanich
Claire Yiu
Mandy Lee Cho
Lau Kong
Moses Chan Ho
Johnson Lee Sze-Chit
Fiona Yuen Choi-Wan
Miki Yeung Oi-Gan
Eddy Ko Hung
Kenny Wong Tak-Ban
Ken Lok Tat-Wah
Lee Shing-Cheong
Benz Hui Siu-Hung
Cho Chun
Chris Lai
Mark Kwok
Lee Tin-Cheung
Steve Lee Ka-Ting
Chan Dik-Hak
Jerry Koo Ming-Wah