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Watch The Wig online — it may be available on legal streaming platforms such as YouTube, Netflix, Prime Video, Hulu, Disney+, and others.

In Seoul, Su-Hyeon is terminal with leukemia, and bald due the treatment of chemotherapy. Her sister Ji-Hyeon buys a long-haired wig, but she does not disclose the truth about Su-Hyeon's health condition to her beloved sister. While wearing the wig, Su-Hyeon recovers her health and hits Ji-Hyeon's former boyfriend Ki-Seok, changing her behavior and relationship with her sister. When Ji-Hyeon discovers that the wig is possessed by a fiend, she finds that it was manufactured using hair of a cadaver and a dark secret about Ki-Seok's sentimental life.