Invisible 2: Chasing The Ghost Sound(2011)

Original title: 귀신소리 찾기

Geum Ja has been living alone since her husband and sister passed away. Lately, she keeps hearing her late sister's voice around the house. To find out her sister's message, she enlists the help of a television program that investigates supernatural happenings. Once the TV crew is there, however, the ghostly sounds disappear, and conflicts develop between Geum Ja and the crew. Just when the crew is about to pack up and leave, they record a woman's voice.