Razor-sharp crime drama about a psycho mass-murderer(convincingly played by Simon Yam), allegedly based on a true case. This movie is extremely gruesome and definitely not for the squeamish. In tone it's closer to, say, the modern crime fiction of James Ellroy or Andrew Vachs, or an American movie like Henry: Portrait of a Serial Killer, than to your standard Hong Kong entertainment. But if you can take it, it is a very well made and very scary modern horror movie.