Nightingale Wong is a super heroine who looses her memory when her triad boss father is murdered. She is taken in by a kindly prostitute, and eventually takes revenge.
An expert assassin - trained since childhood to be the perfect killer - loses her memory during a mission in Thailand, and ends up in the care of a wry ex-policewoman and her boxing cohort. The equally lethal sister of the assassin pursues her, uncertain of her intentions and whether to kill her.
Lung comes from China to Hong Kong in search of a new life and fortune. He is employed as a security officer by Lee at a night club that he runs. When Lee’s partner dies, his business is endangered by his partner’s son, Soufu. As retribution, Lee’s daughter May, hurts Soufu. Soufu’s anger gets the best of him, and he murders Lee. May must now make the next move in this deadly game of chess, and asks Lung to help her avenge Lee’s death. Lung hesitantly agrees, and the hunt is on to give Soufu exactly what he deserves!
Bullet, a female triad member, is recently released from prison. Bullet hooks up with her old gang rather quickly, although she is being closely watched by her policeman father and his gritty female partner Big Aunt . Bullet steals some jewels belonging to triad gangster Chin Bo while helping her friend May, who has been forced into prostitution. Chin Bo, also known as Brother Mad, kidnaps May and another of Bullet's friends to secure the return of his fortune, but the exchange goes wrong and a furious gun battle erupts.
Yuen Tak Wah (Andy Lau) has been practicing Taekwondo since he was a kid and becomes an expert at it with his best trick being the 720 Degree Whirlwind Kick. Wah later becomes a cop and uses his good skills to contribute in cracking cases which leads to the jealousy of Officer Cheung Yeung (Roy Cheung), the leader of the rival team. Cheung is also a Taekwondo expert who has a won a championship at the Hong Kong Police Force's Taekwondo Tournament.
