The Butterfly Murders 1979

Fong is a writer who records all kinds of marital arts events. As he heard that there are victims killed butterfly, induced by his curiosity, he heads for Shum castle where he believes helding the key to the secret of these fatal attacks. However, master of the castle Shum Ching and other guests invited also become the victims of the butterfly during the investigation. It turns out that is the conspiracy of Shen Cing, who wants to kills all the leaders and become the King of the martial art world...