ringo lam first hong kong film after his try in hollywood be an impressive one . the plot itself have so many unexpected twist that you can watch it easily twice and still discover thing you do not see the first time . the good camerawork give the movie atmosphere of tension and fear and the supernatural an extra boost . the cast have prove itself already in several other hong kong film and also here they deliver an excellent performance . this movie be a good start if youre not into hong kong film but want to give it a try and for the real fan it a must see .