Ji-won
a magazine journalist is threatened for taking part in an investigation into a
scandal and forced to change to a new phone number. Yet even more terrible
things happen. Her phone rings with mysterious messages. Young-joo, the young
daughter of her friend Ho-Jeong, acts strangely and tries to kill her mum after
she accidentally answers a dreadful call. When Ji-won tracks down the previous
users of this phone number, she discovers that all of them have died a horrible
death...Who makes all these phone calls?
