It is not that rare to find a film in which almost all of the IMDb reviews are negative. However, it -is- rare to find a film in which all (or almost all) of the reviewers gave the film negative reviews for virtually the exact reasons.
Aaron Kwok plays a police detective in charge of an investigation into a string of serial murders, who suffers amnesia apparently as a result of an incident shown in the opening sequence of the film (and in which another police detective was seriously injured). The first half of the film shows his state of mental decline as he gradually succumbs to paranoia when he (re)discovers clues and evidence that seems to finger him as the murderer. This part of the film is very well done, minus the grizzly murder scenes and the opening sequence, which are clearly gratuitous. Kwok makes a convincing performance as a detective who is simultaneously convinced that he is being framed but unable to deny the trail of evidence that confronts him. The uncertainty over his role in the murders is compounded by his amnesia and his personal conviction regarding his innocence, which compels him to conceal damning evidence from his colleagues while trying desperately to hunt down a killer that he believe is still "out there." "Western" audiences are most likely to compare this segment of the film to Memento given the amnesia component and the gradually unfolding clues that lead the main character to question his starting assumptions.
Half way through the film, things take a horrendous turn. A rather ridiculous "twist" is inserted into the plot that begins to unravel the film, rendering it "silly" to the point of laugh out loud hilarity. I won't spoil the "twist" here, but there are a number of reviews with spoiler warnings that will save you the 2 hours or so that you might otherwise waste watching this film. It's too bad, really, since this film could have been so much better.
