A male corpse is found inside a kitchen waste bin on the university campus. The Forensic Science Division and the Regional Crime Unit work together on the investigation, during which the dormitory warden points out that the victim WU SAI-HANG had become incredibly aloof since the excruciating “Bus Nerd” clip was released on the Internet. TUNG has no idea what has caused the grid-shaped wounds on SAI-HANG’s back, while CHING-MAN is curious to know why someone as good at technology as SAI-HANG would have such an outdated pinhole camera. CHAN and his teammates have found a video clip on SAI-HANG’s cell phone, which shows a group of people, including YEE and FUNG, performing street dancing. YEE and FUNG have come to realize that SAI-HANG was also there that very night as a member of the audience. YEE goes to question SAI-HANG’s classmate OSCAR.… ...