Two mismatched Hong Kong police detectives, Yau and Yue, were assigned to work undercover as a live-in couple to track down a serial killer accused of murdering adulterers. In the meantime, Yau (Anthony Chan) is coping with his girlfriend having left him, and Yue (Sandra Ng) is losing her boyfriend to a college girlfriend of his.
Ju
Yau
Li
Wang Chieh
Chang
Li's Father
Li's Mother
Chief Inspector Wong Kwok Wing
Simon Piglet
Fatty Lun
Fatty Lun's Wife
Yau's Grandmother
Doctor
Yau's Relative
Ambulance Man
Wedding Guest
Wedding Guest