==Plot==
The film begins with "Scottie" Ferguson, a [[police|police detective]] chasing a criminal across a city rooftop. During this chase, a fellow officer falls to his death, and Ferguson finds that his feat fear of heights has increased to a problem with vertigo. He has to retire from his police work as a result of his disability.
A former college friend of his, Gavin Elster, hires Scottie to spy on his wife Madeleine, telling him that she has been acting strangely and he suspects she may be suicidal. Scottie trails Judy to an [[museum|art museum]], where he watches her for three hours as she stares intently at a portrait of Carlotta Valdes, a Spanish matron who has been dead for more than two centuries. Then she goes and buys flowers and puts them on Carlotta's grave.