LOONG and WAI are good friends working at the same police station. One day, a female corpse was discovered at Deep Water Bay. The way how she was murdered reminds LOONG and WAI of a similar murder case years ago. So they go to find CHING, the girl who survived the murder, for information. However, this is known by a reporter and the full story is publicised. CHING's life is jeopardised. LOONG andWAI vow to protect her.

LOONG is reported for abusing a suspect in a robbery, and is hence transferred to handle clerical work. He is very frustrated and requests for resignation. He insists WAI to leave with him but is refused. He is even more depressed than ever. In order to help LOONG, WAI arranges LOONG to be employed as the in-charge in his friend's detective agency.