The first half has Eric Tsang and his friend chasing women in typical HK juvenile manner - though the bit with Eric pretending to be a robot was pretty good. It turns out that the friend has ESP powers and can enter into someone's dreams. Eric becomes a witness to a murder of a cop - the friend enters his dreams to see who the killer is. Chow Yun Fat shows up late in the movie to investigate the murder and Anita Mui has a very memorable gut wrenching cameo. Both are in roles that are unexpected. Though I rate it a 6 - its really 4 for the first half and an 8 for the second.
My rating for this film: 6.0