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After the death of her famous opera-singing aunt, Paula (Ingrid Bergman) is sent to study in Italy to become a great opera singer as well. While there, she falls in love with the charming Gregory Anton (Charles Boyer). The two return to London, and Paula begins to notice strange goings-on: missing pictures, strange footsteps in the night and gaslights that dim without being touched. As she fights to retain her sanity, her new husband's intentions come into question. Wikipedia