Two men who have a great deal in common become friends, only to find themselves turned into enemies in this slam-bang action fest from Hong Kong. Tyler (Nicholas Tse) is a man trying to make a career in a rough section of Hong Kong. One night, after several drinks too many, he hooks up with Ah Jo (Cathy Chui), an off-duty undercover cop who has also had a bit more alcohol than usual. Tyler and Ah Jo spend the night together, even though she usually prefers the company of women, and Ah Jo soon finds she's pregnant. Ah Jo has no desire to remain involved with Tyler, but he wants to do the right thing, so he takes a job as a bodyguard for low-level gangster Uncle Ji (Anthony Wong) and sends her his money, all the while wishing he could be in Brazil. Meanwhile Jack (Wu Bai), who once lived in Brazil, is back in Hong Kong with his very pregnant wife Ah Hui (Candy Lo), the daughter of a triad kingpin targeted by Brazilian gangsters. Uncle Ji is in charge of protecting the triad leader, and he makes Tyler one of his right-hand men. Tyler and Jack get to know one another and become close friends, but their friendship comes to an end when the Brazilian mob makes Jack an offer he can't refuse, putting the two men on opposite sides of a gangland war. Seunlau Ngaklau was directed by Tsui Hark, who returned to Hong Kong filmmaking after a brief sojourn in Hollywood.
by Mark Deming synopsis