Dai Yat Gaai plot
"Rule #1: There are no ghosts"
Young Sergeant Lee was injured in a gun battle and has now been transferred to the mysterious Miscellaneous Affairs Department (MAD). There he is assigned as a partner Inspector Wong, an alcoholic and veteran who declares that MAD handles supernatural matters. He goes on to say that MAD's number one rule is that there are no ghosts and that there is a scientific and rational explanation for everything. MAD begins an investigation into bizarre teenage suicides. These suicides are impossible unless the victims were possessed by something. As Lee and Wong follow the tracks, they realize they are on a dark road.