After writing a series of articles about a pedophilia scandal, the journalist Ji-won often receives threatening calls on her cell phone.

One day, Ho-jung's daughter Young-ju answers an anonymous phone call to Ji-won's new number, then screams and passes out.

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.

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 impress by practicing "Moonlight Sonata".

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.

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.