For CHUI SHAN's safety, KA MING releases PONG and CHIN. PIK YING is very angry as her effort has been spoiled. Although they apologise, PIK YING does not accept them. LAM CHUI FUNG is entangled by her failure in love, she commits homicide but is discovered. KA MING and CHI WAI help to bring her to hospital. On their way, PONG and CHIN attack them, putting them in dangerous situation. Fortunately KIN CHUNG arrives in time to save them. They are saved and friendship consolidates among them. CHIN sets a trap, wanting to kill KA MING. KA MING discovers it and manages to escape. However PIK YING is frightened. This gives her a bad impression. KA MING and CHI WAI come back to Hong Kong. Suddenly they receive the news about CHI and PONG. They rush to the trigonometrical station when they start a dull.