This is Johnnie To's most recent film, and he certainly hasn't lost his touch. Three is an economical 88 minutes long, and despite the previews, it takes more than an hour for the special To violent scenes to really burst. Until then, Three is a medical drama that takes place in a hospital. There is some tense suspense, because one of the patients is a dangerous thug with information the police want, so even as the movie seems dedicated to sticking with the medical angle, you keep expecting something awful to happen.
Actually, something awful happens right away, as an overworked doctor (Zhao Wei) botches a brain surgery. The three main characters of the title are the doctor, a cop, and the thug, and they are all working their own agendas, with the doctor and the cop trying to save people and the thug just going for what he wants. Various other patients also have distinctive personalities ... it's amazing how many characters we get to know in such a short movie.
The simmering pot finally boils over in the last 20 minutes, including a remarkable shootout in the hospital that seems partly like an homage to Hard Boiled. After To spends most of the film seemingly hiding in the shadows, he cranks up the style (this has also been compared to The Wild Bunch, for the way it takes its time getting to the slaughter).
Zhao Wei (aka Vicky Zhao) is great as the obsessive doctor, but Wallace Chung has the showiest role as the thug, and he plays it just this side of over the top. This is one of To's better movies. 8/10.