Y is an 18-year-old highschool senior whose friend Woori has struck up a correspondence with J, a 38-year-old sculptor. After talking to him on the phone, she is aroused by the sound of his voice and arranges to meet him at a
love hotel so she can have her first sexual encounter on her own terms instead of losing her virginity to rape like her two sisters did. The two have sex as soon as they enter the motel and proceed to have
anal and
oral sex. In their next tryst, he confides in her his interest in
sadomasochism and she allows him to beat her on her buttocks before they have sex again. As time goes on, they engage in regular trysts where he beats her with increasing intensity, using a wide variety of implements. At first, Y only goes along with it to make J happy, telling Woori that she desires whatever he does, but she eventually takes a liking to being beaten. When J visits his wife in
Paris, his relationship with his wife deteriorates when he begs her to beat him; she refuses and the film reveals that his sexual desires have been a strain on their marriage for years. After an unusually intense beating, Y becomes angry and J offers to let her beat him. She assumes the dominant role in the relationship and they ultimately take turns beating each other. Y's brother discovers the affair and sets fire to J's house. Y cuts her hair and drops out of university and J leaves home and they spend the remainder of their relationship living in hotels, having sex every night, carving tattoos onto their inner thighs, forgoing work and rejecting society. When Y's brother dies in a motorcycle accident and when J runs out of money, Y leaves J in spite of his pleas for her not to. J ultimately moves to Paris to live with his wife. Years later, J receives a phone call from Y, who is stopping over in Paris on her way to South America to live with her sister. They meet one last in a hotel and she changes into her old school uniform and beats him with the handle of a
pickaxe, fulfilling a fantasy he once expressed to her. After the encounter, they never see each other again. When J's wife asks him where he got the tattoo, he lies. == Production ==