The undercover Lee Chi-Kit, shrewd and capable, is responsible for investigating a drug gang. He becomes friends with an assassin named Eva and falls in love with the mistress of the gang leader, Judy.

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......