Victim (1999)
Victim is a 1999 thriller film directed and co-written by Ringo Lam. The film stars Tony Leung Ka-fai, Lau Ching-wan and Amy Kwok and is about a computer programmer named Ma who is found in a haunted hotel by a cop. The programmer begins to terrify his girlfriend Amy Fu, which leads the cops to think that Ma is covering up some larger crime.
More at Wikipedia.