Ti Lung plays Zeng, an aging police officer for whom life takes a difficult turn when his ex-wife is killed in a car accident leaving him responsible for his daughter. Having moved on and remarried he finds that his daughter, CoCo (Sherming Yiu), is resentful and relationships are strained as the two have never really spoken since Zeng left when CoCo was aged 5. Rather than trying to fit into her new life CoCo instead turns to her friends and finds solace in a world of nightclubs and drugs.

Zeng becomes concerned when he discovers that CoCo has started going out with a young triad member, Li, and when he confronts his daughter over drugs he finds in her schoolbag she runs away from home. Meanwhile Li's 'Big Brother' is having trouble with a rival gang leader and CoCo finds herself drawn into the conflict with tragic consequences.

Many of the actors are newcomers but all give excellent performances in this enthralling drama. Ti Lung especially shows that he still hasn't lost it in the acting stakes. He is perfectly cast as the cop struggling to be a father who is completely at odds with his daughter's lifestyle. Sherming Yiu is also good as CoCo, managing to carry off the troublesome schoolgirl act perfectly. In the film's closing moments her character's grief is made totally believable.

The story moves along at a steady pace, without ever dragging and becomes particularly gripping when the triad element of the story comes to the fore. A lot of this is due to the air of menace given to the villain who has a particularly nasty, but perfectly understated, edge. At times the film is reminiscent of 'Spacked Out' with its focus, for a large part, on CoCo and her teenage friends enjoying the nightlife. Despite the drug use in the move I was surprised that the film only received a category IIb rating (especially when Spacked Out was CatIII).

The film has a very contempory look which is obvious from the second the opening credits burst onto the screen with a barrage of club culture images set to a hip dance soundtrack. I was gripped from this moment to the end.