Learning of childhood friend Meihua's death, Lingling goes to Japan to find Meihua's sister, Meifeng. Brutal gangsters demand Lingling return an item Meihua stole, and hold Meifeng hostage. Old friends help Lingling confront the gang.
Vice Squad 633 sends crack narcotic fighters Wong and Miss Chow to the slums to flush out the traffickers. They catch Spareribs, a minibus driver who has become an addict because he foolishly believed in a quack doctor. Wong and Chow decide to give Spareribs another chance and he offers to be an...