SDU officers and drug dealers engage each other in a gun fight at a pier. KA-CHUN leaves his team behind and chases after Coke as he catches sight of him escaping. YU-HONG accuses KA-CHUN of inappropriate conduct and assigns him to the back office. Kenny, a mystical person, goes to an underground casino to look for Coke. Kenny proposes a collaboration project. LIP SUET-YING, YU-HONG’s daughter, returns home after graduation. She wants to see KA-LONG, her so-called elder brother. Recently, undercover police officers have been caught out by gangsters and executed according to underworld rules. KA-CHUN contacts his undercover colleague as he wants to investigate the case of YAT-TAI being held hostage. The duo end up being pursued by assailants on a tram. During an SDU training session, CHEUK-FUNG makes YEE-FEI team leader. Her male colleagues are not happy.