Yasuko lives in a high-rise apartment in the city with her husband and her son. Being nervous about prank calls and salesmen's solicitations, she slams the door on a salesman's finger when he tried to forcibly insert a pamphlet through her door chain. This leads him to start harassing her, starting off with obscene letters written on her door then steadily escalating to full on stalking, building up to an unbelievable last 30 minutes of chaos!