Yumi tries to assuage the fears of a friend, Yoko, who has received a disturbing voice mail from herself. In the message, Yoko screams while chatting with Yumi. Three days later, the exact call plays out, and Yoko dies. As the bodies of Yumi's friends start piling up after they receive voice mails and videos of themselves, she discovers that a vengeful spirit is the source of the disturbing messages and murders -- and all the messages are strangely connected to her.