Classic drama starring Ingrid Bergman as a woman who believes she is going mad when she moves back into the home where her aunt was murdered. Paula (Bergman) is initially disturbed when the gaslight in the house starts flickering unexpectedly and she becomes convinced she can hear footsteps in the attic, which has been shut up for years. Then there is the case of the unknown man (Joseph Cotten) she begins seeing everywhere and numerous other strange events that seem to relate back to her aunt and the house. Will Paula be able to get to the bottom of her aunt's murder and the strange goings-on before the mystery drives her insane?