A young woman accidentally dials the number of a serial killer who decides to make her his next victim.
When a young, lonely woman misdials a phone number by one digit, calling into a serial killing in progress, the killer latches onto her and involves her telephonically in a string of murders as he heads closer and closer to her home in Boston.—Anonymous
A young woman who is disturbed by her break-up with her boyfriend is seen attempting to call her mother; instead she dials the wrong number, and reaches an answering machine. Then she gets a call back ("caller ID") from man who responds oddly, keeps calling her back. The next day the police show up at her apartment and she finds out the Christine she accidentally dialed had been murdered around the time she has mistakenly dialed her number instead of her mothers out in Nevada. The next day she receives another call from him. When he hangs up she dials 869 to get the number and calls it back. A woman answers and she warns her to get out of the house. Right then her little boy says Mommie there's a man in the hall. At that point the call is interrupted by a woman and child talking in the background, and then she hears screaming. Subsequent calls from the man correspond to additional murders, as the man appears to be making his way across the country toward her in Boston. A policeman and FBI profiler take up residence with the young woman as they await the arrival of the serial killer. Despite their efforts, the man makes it into her building and kills one of the FBI agents in trying to abduct her. Just as the policeman and FBI profiler rescue her, and are taking her to the hospital, she is suddenly alone in her building lobby, confronting two detectives who are investigating her boyfriend's disappearance. The entire serial-killer experience is revealed to have been an hallucinatory event, triggered by her shock at having accidentally killed the boyfriend, the man who was seen as the policeman during her "dream".
