San Francisco police detective Scottie Fergusson develops a fear of heights and is forced to retire when a colleague falls to his death during a chase. An old college friend (Gavin Elster) hires Scottie to watch his wife Madeleine who has reportedly become possessed by her ancestor's spirit named Carlotta. Scottie follows her around San Francisco and is drawn to Madeleine and her obsession with death. He unwittingly becomes a figure in a complex plot, and is determined to discover the truth behind it all.