Phone is a 2002 South Korean supernatural horror film written and directed by Ahn Byeong-ki and starring Ha Ji-won and Kim Yoo-mi.
Plot[]
After writing a series of articles about a pedophilia scandal, the journalist Ji-won often receives threatening calls on her cell phone. Hence she changes her number and moves to an empty house which is owned by her sister Ho-jung and Ho-jung's husband Chang-hoon. One day, Ho-jung's daughter Young-ju answers an anonymous phone call to Ji-won's new number, then screams and passes out. Days after, Young-ju begins to show a disturbing attraction for her father and jealous rejection towards her mother. Meanwhile Ji-won gets more anonymous calls and sees a long-haired ghost playing Beethoven's "Moonlight Sonata" on the piano. She finds out that her number originally belonged to a missing teenager, Jin-hee, and that its two subsequent owners had died mysteriously in unusual circumstances.
Ji-won visits Jin-hee's mother at their home and finds a diary and a picture of Jin-hee and Jin-hee's best friend, Sang-mi. Ji-won goes to Sang-mi who is now-blind and deaf. Since Sang-mi was haunted by Jin-hee's spirit, she decides to stab her own eyes and ears to make it leave her. She says that before she went missing, Jin-hee was obsessively in love with an older man whom she tried hard to practice "Moonlight Sonata" to impress. However they broke up even though she was pregnant with his child. Ji-won explains to Young-ju's parents that Young-ju could be in danger, but Chang-hoon's refusal to accept it upsets Ji-won. In Ji-won's flashback, it is shown that Ho-jung had been infertile, so Ji-won gave Ho-jung her egg for in vitro fertilisation in order to conceive Young-ju. In this sense, Young-ju is not Ji-won's niece but her biological daughter, whom she loves and cares deeply for.
Ji-won continues her investigation into Jin-hee's diary. In surprise and shock, she learns that Jin-hee's lover was indeed Chang-hoon. He used to cheat on his wife by bringing Jin-hee to the house Ji-won is staying at, but soon after Jin-hee became overly-attached, he, despite her pleas, broke it off, as he never wanted to leave his family. Jin-hee found out she was pregnant and called Chang-hoon repeatedly but he ignored her. Believing that Chang-hoon has something to do with Jin-hee's disappearance (more likely death), Ji-won threatens to tell his wife if he does not cooperate. Young-ju, who is possessed by Jin-hee's ghost, goes to Ji-won's house, in Bang Bae, jumps down the stairs and is hospitalized. Ji-won searches the entire house and finds Jin-hee's dead-body hidden inside one of the walls. At this point, Chang-hoon arrives and sees everything. They run away before getting knocked unconscious by Ho-jung.
Ho-jung confesses that she discovered the affair years ago and confronted Jin-hee. In her denial, Jin-hee fooled herself that Chang-hoon truly loved her, and mocked Ho-jung's infertility. Ho-jung told Jin-hee to abort, which made her mad, resulting in a fight. By accident, Ho-jung pushed Jin-hee down the stairs and killed her. Ho-jung hid Jin-hee's body inside the wall and plastered cement over it. With no regret, Ho-jung claims that aside from being jealous of Jin-hee, she is also jealous of Ji-won, who secretly shares with Ho-jung the motherhood of her daughter. Ho-jung then stages a suicide for Chang-hoon, who has died, making it seem that he was guilty for both Jin-hee and Ji-won's deaths before killing himself in the bathtub.
Ho-jung plans to burn the house down with gasoline. However, Jin-hee's spirit awakens and, in revenge, strangles Ho-jung to death, thus saving Ji-won. The film ends with Ji-won dropping the cursed cell phone into the ocean. After it enters the water, it rings.