Black Butterfly (1990)

"Black Butterfly" is a 1990 Crime movie directed by Yu Chi-Wei and starring by Carol Wan Chui-Pan, Tsai Chia-Hung. Black Butterfly tells the story of a female assassin who is sent to Taiwan to clear the way so a gang from Hong Kong can take over the territory. Problems arise when she breaks the cardinal rule of an assassin -- never develop friends -- and she cannot complete the job. Now hunted by both camps, the killer must turn into a savior as she tries to help her friends.