An undercover cop goes deep undercover to inside one of Hong Kong's most notorious Triad gangs only to find him getting consumed by a life of crime and seediness.

Chen Dali was a waiter at an old Chinese restaurant. One night, she saw a ghost. It was the spirit of a girl who used to sing there. The girl was brutally murdered. The two fell in love with each other. Shortly afterwards, Dali's colleagues died one after another and to his amazement, they died exactly like what he had dreamed of. It seemed that the ghost was using Dali to find the murderer, and Dali found himself in deep waters......

A Cantonese librettist enjoys immense popularity over the course of decades, followed by decline.