After witnessing a murder, Alice Kildee (Bonnie Bedelia) is involved in a car accident. She wakes up in a hospital with no memory of who she is, but has total recall concerning the murder. The problem is, no such killing has been reported. So the authorities, assuming that Alice is merely fantasizing, release her picture to the papers in hopes of identifying her. Through the help of psychiatrist Harris Kite (Peter Riegert), Alice comes to realize that the murder she has described in such vivid detail actually took place in a movie she saw just before her accident. But if this is the case, why is a hitman (David Spielberg) determined to rub out poor Alice? There's a plot twist a second in the U.S./Argentine co-production The Stranger, which manages to emulate Alfred Hitchcock without ever imitating The Master outright.
by Hal Erickson synopsis