A mysterious blonde woman kills one of a psychiatrist's patients, and then goes after the high-class call girl who witnessed the murder.
Although basically a succession of brilliantly staged sequences all in homage to Hitchcock, this movie manages to deliver the shocks and to entertain with a good helping of wicked humour.
Halliwell**: "Occasionally brilliant, generally nasty suspenser clearly derived from many viewings of Psycho. Certainly not for the squeamish."
Maltin***1/2: "High-tension melodrama...Writer-director De Palma works on viewer's emotions, not logic, and maintains a fever pitch from start to finish."