A brother and sister, both pent up with sexual frustration, find themselves alone in the house. She starts masturbating in the bathroom, her moans echoing through the empty halls. He hears her, and unable to resist, joins in his own room. Their shared pleasure escalates, leading them to confront each other, naked and horny. They confess their desires, and she begs him to fuck her hard. Just as they're about to consummate their taboo passion, a creaking floorboard signals an unwanted interruption.