Rebecca Matlock is in the thick of politics, enjoying her work as a speechwriter for the governor of New York, who's facing a reelection campaign. What she's not enjoying are the menacing phone calls from a stranger who refers to himself as "your boyfriend" and warns her that he will kill the governor if she doesn't stop sleeping with him. Although Becca has never had a sexual relationship with her boss, she is increasingly frightened by the phone calls. The police, who were initially sympathetic to her plight, make it clear that they regard her as a hysteric, even after the stalker murders an innocent bystander to convince her that he means business. Becca seeks refuge in Riptide, an isolated community on the Maine coast, but terror continues to dog her. The skeleton of a woman who may be the missing wife of a college friend is unearthed in the basement of her new house; the stalker tracks her to her chosen refuge; and she is sought by the police and the FBI following an assassination attempt on the governor.