Psycho Killer

Psycho Killer (Original Title Yu Ye Tian Mo) is a 1993 Hong Kong horror thriller directed by Stanley Wing and starring by Chingmy Yau, Francis Ng, Isabel Leung, and Soi Cheang.

Plot
Female detective is on the trail of a serial killer raping and murdering busty women, whose victims include the policewoman's sidekick. Along the way, she seeks help from another cunning serial killer called Lam, already in jail, who can hypnotizes his victims. In exchange for Lam's psychological insight into the case, she may have to pay the ultimate price.