Part-Time Lady (1994)

Former policeman Pok Tin Leung, now a taxi driver, rescues two nightclub hostesses (Lily and Annie) from difficult customers. The next morning, the hostesses' boss, Fanny Lin, is found dead. Annie's boyfriend Shaun, a barman, runs away when police ask questions. Lee, a gangster Pok once arrested, was the boyfriend of the deceased. But he is seen the next day with another woman on his arm. Darwin, the investigating cop, asks Pok for help. Pok is his former boss. Darwin is secretly a friend of Lily. And the way Lily came to work for Fanny is an interesting story in itself.