 A struggling bar singer takes a job as a phone-sex operator in order to make ends meet. One night she gets a call from a man who tricks her into listening while he murders a prostitute. Then he tells her that he s going to kill her next. She goes to the police, but the detectives don t believe her. However, an ambitious uniformed cop does believe her, and together they try to track down the killer before he kills anyone else--including her.