In the quadripartite drug market in Hong Kong, Jizo (Louis Koo) gradually expands in collaboration with some Mexican drug lords across the border, followed by a chain of dog-eat-dog events which shock and bring the whole trade on high alert. On the other hand, Yu Shun-Tin (Andy Lau), a former gangster member and now a financial tycoon, is offering a bounty to eliminate the No.1 drug dealer in Hong Kong, which causes a stir in society. Policeman Fung (Michael Miu) intends to arrest Jizo, but now he is responsible for protecting Jizo instead due to the bounty. A final battle has broken out between the two tycoons which were once lesser-known brothers from the same triad.