The Iron Butterfly 2 (1990)

The Iron Butterfly 2 1990 / 特警90 II 之亡命天涯 1990 / The Iron Butterfly II - See No Daylight , Dak Ging 90 II - Zi Mong Meng Tin Ngaai

A Hong Kong homicide detective insists on the same name that his father, Rock Moon had. In this case The Iron Butterfly's mother is being treated in a psychiatric hospital. The two find that they are both working on taking down the same drug trafficking and crime-ridden campaigns. (Source: Letterboxd)