Chief Inspector Robin (Teddy Robin) receives information about the release of a felon who is rumored to be interested in murdering someone. At first, he is unable to determine the identity of both the felon and the supposed victim. However, after some research, he concludes the felon is triad boss Ah Capone (Karl Maka) and the victim is private investigator Yoho (George Lam). In order to protect Yoho, Inspector Robin arrests him on a trivial charge and locks him up at the police station.