Modest, but effective, crime film. It brought to mind such American crime films of the 40's like THIS GUN FOR HIRE and OUT OF THE PAST, with a trenchcoat-wearing, despondent female killer (Ng Sin Lin) in the place of an Alan Ladd or Robert Mitchum. The notion of the killer's abnormal blood temperature (thus the title) is never explained, or expounded upon, but that only adds to the odd, abstract tone of the film. There are some "hokey" voice over narrations ala WKW (they've been hokey since about 1940), but again, it only added to the "noir" feel of the picture. The most tragic and interesting character in the film was Ng Sin Lin's mother figure, whose treachery against Ng really gets the viewer right in the gut. Ng's eerie "non"-reaction to her death is quite good. The finale was rough, gory, a bit hackneyed (esp. final scene of doomed lovers together in bullet-riddled car), but it didn't spoil it too much. No balletic gunfighting, just hard, bloody stuff. I have yet to mention Lau Ching wan yet! He's very good as usual, except for the scene where he sees Ng kill a man for 1st time... a little overdone. May I add the first time I saw this movie I didn't like it...but, it's one that I really do recommend.