Crimes of Passion (1984)

A sportswear designer leads a double life as a hooker named China Blue. One of her clients, a divorced man, decides he loves her and figures out who she is. He then begins wooing her, which she fights against since he was a client. Meanwhile a street preacher works the red light district trying to save souls. He decides to save China's immortal soul and begins hounding her. Eventually he gets out of hand and the man in love with her must try to help her.