Aaron Kwok is the reason to see this movie. He is the detective on the case. Soon it becomes clear that he isn't like any other private eyes in the movies. His motives for becoming one are personal. (I am not going to reveal what that fact is because it is important to the plot.) When he is hired by this man to find a woman who he claims is stalking him, things start to happen. He realizes that this is a serious case and really is on to something. Kwok does get some help from a friend in the police department (Kai Chi Liu). The interaction between him and Aaron provide most of the funny scenes. Still it is a one man show where it is fun to see Kwok investigating. Some elements of the mystery that has to be solved are pretty obvious. But I think that this is done on purpose since the focus is not the mystery it self but Kwok solving it and becoming a true private eye. The conclusion therefore is pretty decent and satisfying. There is a set up for a possible sequel. Well,if the Pang Brothers continue in this manner than they have my blessing!