A PTU company, made up of 2 teams led by Officer Mike and Kat respectively, begins its anti-crime patrol through the harbor area. Meanwhile, they discover that Sergeant Lo was attacked by the punks and lost his gun. Mike decides to give Lo until down to find his gun back. Inspector Cheung from CID is in charge of investigating Ponytail’s death. Lo’s suspicious behavior make him a likely suspect on Cheung’s list.