Ng Sin Lin plays a nameless assassin always on the move in order tohave no history or identity. Just when she meets simple noodle cart owner Shek Long (Lau Ching Wan) and starts having second thoughts about her lifestyle, a recent hit comes back to haunt her. A very uneven film that is never sure if it should be a straight action film or love story (I'm guessing Patrick Leung was trying for an action film with substance). The film has a nice visual style, and Lau Ching Wan and Ng Sin Lin have genuine chemistry, but it never quite comes together. The story moves along too fast, making the relationship seem rushed. The title refers to the assassin's unusual body temperature; not that this has any relevance to the story.