In ancient China, a group of martial arts masters’ team up to steal a magical Lyre, that corrupts the souls of those who possess it. The Lyre is also coveted because of its supernatural powers well versed musician can release the power of the Lyre in a great destructive force. The allied masters and their soldiers Pearl Harbor the home of the man who guards the Lyre. The evil masters attack the man’s family, resulting in the death of everyone except for his son, Lui Lun, and his older sister, Snow, who escapes with the Lyre.

Years later, Snow (Brigitte Lin) is a lethal practitioner of the martial arts, who has mastered the powers of the Lyre. She puts into effect her plan to strike back at those martial arts masters who destroyed her family. Lui Lun (Yuen Biao) is also fully grown, and well-versed in Kung Fu, but he has no idea that his parents were murdered, as he was adopted by a wise man who owns an escort agency. Snow entangles her brother in her plot to gain revenge when she hires him to transport the Lyre across treacherous terrain, where bandits and enemies threaten to steal the instrument of doom. Meanwhile, the alliances of power-hungry masters (who are her targets) convince the citizens that she is a witch. Even her brother Lui Lun believes she is a witch and promises to kill her.

Finally, a friendly Monk informs Lui Lun the truth about his family. Naturally, he is shattered and changes his opinion of his renegade sister. In order to save their collective skins, the alliance of old masters set a trap for her. Lui Lun and Snow must team up if they are to defeat the overwhelming odds against them.