Watch Purple Darts (1969) Official Trailer

She promised to let him kill her once she has finished her mission of vengeance.

In an attempt to seize the famous Tai Hsuan Book of Swords the outlaws Wang, Ku, Lu and Pai Feng attack the Hsia Tien Tsai Mansion and slaughter all righteous opponents. Only Hsia’s baby daughter survives and the dying mother leaves a message in blood to urge her to take revenge once she is grown up.