AllMovie

All alone in a big mansion, the baby-sitter hears one of the phones ringing. When she answers it, an abusive and obscene caller begins threatening her. She calls the police on another line. Meanwhile, the caller breaks into the house and seems to be preparing to rape her. However, she and the man get to know one another slightly, and she discovers that he is a desperate and lonely man, and begins to feel some pity for him. Tension builds as the police surround the residence and demand that he come outside.