Broken Oath (1977)
This film is dark, grim, and has the common HK 'revenge' theme. Angela Mao plays Lotus Liu. Her father is killed by an infamous quartet of assassins. They spare her pregnant mother, who is sent to a prison island. While in prison she gives birth to Lotus. Her mother simply states, "It doesn't matter. Boy or girl, this child will have vengeance. My daughter is born into hate." Lotus begins seeking the four assassins one by one. Taking on the masters singly or their gangs by the dozen she cuts a swathe of bloody destruction.