The story follows a somewhat not-so-sane Hongkong police detective Bun (Lau) who, after solving a crime in "his own way" during the opening sequence of the movie, cuts half his ear off, gets suspended from the force and has to lead on his miserable private life, mainly communicating with the creations of his own mind. As some years have passed, another cop in HK police gets missing in action and Ho (On), a former member of Bun's investigation unit, gets the case and decides to call Bun for help.

The flick is (as title refers) a bit on the side of madness. Though, it doesn't truly get deeply attached to the theme, offering a light view of one side of it. Seems that directors Johnny To and Ka-Fai Wai decided to rule out everything that would "ruin" the picture for audiences more on the side of police-thriller. Bun's tendency to descend to schizophrenia is opened to the viewer quite early in the film and also simply, making it clear that it's just a part of film we wouldn't miss. So everything is opened up for the viewer, just enjoy the story (which doesn't offer too much) and enjoy the acting. A bit of non-linear scene-switching, but that wouldn't bother anyone who doesn't still live in 60's.

Bun's character is the star of this film and Ching Wan Lau plays the role well. Comic at times (a super-cop with half an ear and - during most of the film - a bloody bandage wrapped around his head, looking like a bum after a weekly party) but mainly socializing with inner world of himself and - as he states he can see the 'inner personality' of people - those around him. Especially the lovely relationship with his imaginary wife: everything that's worthy to love in her, everything feminine, was hooked to the image of his mind, so when the real wife (now an ex) finally showed up, the only qualities left for her were those of a mean bitch's.

The film would've been quite Hitchcock's style, if the schizophrenic part of Bun had been left unveiled for a longer period of the movie (as the master hinted to play with the audience, not only caress them). What bothered the most - these god damn in fashion hair cuts - why do the characters have to look like the cover picture of some fashion magazine? It's one of the weakest links in almost all modern Asian movies.

3/5