The Wig (2005)
Original title: 가발
The Wig is a 2005 Korean-language horror movie directed by Won Shin-yun, with a running time of 1h 46m. It stars Chae Min-seo, Yu Seon and Bang Moon-soo.
Su-hyeon, a patient with terminal cancer, gets a wig as a present from her sister, Ji-hyeon. Strange things happen as Su-hyeon wears the wig and horror starts to sweep over Ji-hyeon as she watches her sister getting slowly possessed.