A retired San Francisco detective suffering from acrophobia investigates the strange activities of an old friend's wife, all the while becoming dangerously obsessed with her. Former Police detective John "Scottie" Ferguson was asked by a friend to investigate his wife named Madeleine since he was afraid that she might attempt to kill herself due to probable insanity as she thinks that she might be possessed by a dead woman. Scottie agrees and ended up falling in love with her. Unfortunately for him, Madeleine died and he was left alone until a woman named Judy came along and things start to unfold.