Two blood brothers, who have grown up on the streets of Macau, are bound together by a special code of honour. However, this bond ultimately leads them into brutal conflict when they struggle to leave the violent world they live in.

When Dr. Yuen attempts to rescue a girl about to be sacrificed by the Worm Tribe in the middle of a jungle in Thailand, he is damned with seven deadly "blood curses" and must return there to find a permanent cure.

After being released from prison, Tang Kat-Yung exacts revenge on Lee Ah Chai.

A seasoned cop and his rookie partner try to solve the murder of a heroin trafficker.