Bully KIN, a widely recognized character in Lower Flag Street, always go to the beach to watch troop training recently. KIN is actually a top villain in Lower Flag Street and he threatens the villagers for money all the time. KIN teaches martial arts in a kung-fu school and TING comes to challenge him. KIN beats him off with bad tricks. KIN meets TSUI at the wharf and helps her to fight against the thief. However, KIN realizes that TSUI is buck-toothed so he tries to escape immediately. TSUI bites KIN accidentally and KIN decides to take revenge. He plays tricks on TSUI and she ends up biting the wooden pillar of a pagoda in the countryside. KIN’s plan has succeeded and he is overjoyed. HUNG arrives at Lower Flag Street and finds that KIN is telling everyone that he had beaten off HUNG’s father YING. HUNG is very upset and rushes to KIN’s kung-fu school to ask for an explanation…