Y, an 18 year-old virgin in her last year of high school, begins a passionate and sado-masochistic affair with J, a 38 year-old sculptor living in Seoul. Y lies to her parents and takes the train to meet J in An -Dong, One of the most conservative cities in Korea with its strong tradition of Confucianism. During the first meeting, Y surrenders her virginity to J. Their sexual relation intensifies along with the sadistic acts that are accompanied. Y submits to J's whip and demands with surprising enthusiasm and considerable fortitude. Subsequently whippings and beatings become the peak of foreplay. After a three-month trip to Paris, J reunites with Y, now a college student majoring in Statistics. With Y legally an adult now, there is nothing to stop the two. At this point, their role during sexual foreplay changes as it is now J who starts asking Y to whip him. Meanwhile, Y's brother sets fire to J's home after learning about their affair. Y responds by leaving the family and dropping out of college. J and Y become sexual vagrants, traveling from motel to motel and living on credit cards and borrowed cash. Their life heads for complete hedonism and abandonment of material trappings.