“Lisa” is informed that her father has a rare ailment that only a mysterious magic crystal hidden in the Thai mountains can cure. With Ken Lo as her right-hand man, she coerces Professor Lau to orchestrate a search for the crystal. When he is kidnapped by a gang that also seeks the crystal, his daughter “Winnie” (Nadeki Fujimi) becomes alarmed. She joins forces with her former boyfriend and former police officer “Leung” (Donnie Yen) and his colleague “Madam Wu” (Sibelle Hu) to find her father. When their confrontation with the gang proves nearly fatal, the trio is rescued by Lisa and her bodyguard. At gunpoint they take over the search for Professor Lau, and form an expedition to find the forbidden cave where the crystal is located. This leads to a running confrontation with the gang headed by the characters of Salvitti and Woods – a confrontation involving firearms, an exploding model aircraft, and excellent martial arts.